Complete Microsoft 365 Monitoring

Q: Can PRTG monitor individual user mailboxes in Office 365?

Yes. The Mailbox sensor monitors specific folders — like inbox, sent items, or custom folders — for email count, message age, and filter-matched emails. It's especially useful for shared mailboxes, service accounts, or executive inboxes. You decide which mailboxes to monitor and set your own thresholds for volume, message age, or sender/subject patterns.

Q: Can I combine Office 365 monitoring with on-premises infrastructure in the same dashboard?

Absolutely. Add Office 365 monitoring sensors to the same device groups and maps where you're already monitoring on-premises servers and network devices. You'll see Exchange Online health status next to domain controller performance, or track Microsoft 365 metrics alongside your internet bandwidth usage. Everything feeds into the same alerting, reporting, and notification system.

See health status, mailbox statistics and health indicators, and user experience across your entire Microsoft Office 365 environment in near real-time.

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PRODUCT OVERVIEW

How Do You Monitor Microsoft 365 Service Health Beyond the Admin Center?

Microsoft 365 service health affects every user in your organization, but the built-in Service Health Dashboard only shows what Microsoft decides to surface. It doesn't track mailbox-level metrics or correlate cloud issues with your on-premises infrastructure.

Paessler PRTG fills that gap by connecting to your tenant via the Microsoft Graph API, pulling service status, mailbox statistics, and workload health for Exchange Online, SharePoint, Teams, OneDrive for Business, and Intune directly into your monitoring platform.

What PRTG monitors: Overall Microsoft 365 subscription health, individual service status (Exchange Online, SharePoint, Teams, OneDrive, Intune), mailbox folder activity and email metrics, service disruptions and downtime, connectivity to Microsoft 365 endpoints

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PRTG is compatible with all major vendors, products, and systems

Full Visibility Into Microsoft 365, From Service Status to Hybrid Infrastructure

Stop Manually Checking the Service Health Dashboard

You can't sit there refreshing the Admin Center all day. So when Exchange goes down or Teams grinds to a halt, you find out the same way everyone else does: help desk tickets start flooding in.

PRTG tracks the operational status of every Office 365 Service automatically. You can monitor your overall subscription health or drill into specific workloads like Exchange Online, SharePoint, Teams, and Intune. Watch for performance issues, downtime, or warning states across the environment. You'll know what's actually happening with your cloud services without refreshing dashboards every hour or waiting for Microsoft to email you about it.

Automated service tracking for all services
Monitor operational, degraded, interrupted, and warning states
Historical data lets you correlate downtime with user-reported issues
Eliminate manual Admin Center checking throughout the day
See exactly which services are affected when problems occur

Catch Mailbox and Email Flow Performance Issues Early

Mailbox problems don't announce themselves. Users don't tell you their inbox is slow until it's already impacting work. Email delays, folder sync failures, and stuck messages create help desk noise you could've prevented.

PRTG retrieves periodic snapshots of the mailbox folder sizes and item count via Graph API. Track email volume and message age in shared mailboxes, distribution lists, or executive accounts. Spot unusual activity patterns before active users complain. Identify folder sync delays that signal authentication or connectivity trouble. Turn reactive mailbox troubleshooting into proactive Performance Monitoring.

Monitor specific folders for email count, message age, and activity patterns
Track newest and oldest message timestamps to catch flow interruptions
Support for shared mailboxes, service accounts, and user inboxes
Spot unusual activity that signals authentication issues
Integrates with on-premises Exchange monitoring in existing dashboards

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Start monitoring your infrastructure in minutes. No professional services, no complex configuration, no risk.

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PRODUCT OVERVIEW

Optimize Network Performance to Optimize Microsoft Office 365 Use

Microsoft Office 365 depends on stable connectivity to dozens of SaaS endpoints. Bandwidth bottlenecks or network path problems hurt the user experience, but Microsoft's Service Health Dashboard won't tell you that.

Track connectivity, latency, and response times to critical Office 365 endpoints. Want to see bandwidth consumption? Monitor OneDrive sync, Teams calls, and Outlook traffic. You can combine cloud metrics with network-level data to get the full picture. Answer the "Is it Microsoft or is it us?" question with real metrics, not guesswork.

HTTP and REST monitoring for Microsoft 365 endpoint reachability
Latency tracking identifies network path issues before users complain
Bandwidth monitoring for OneDrive, Teams, and SharePoint traffic
Distinguishes between Microsoft-side downtime and local network problems
Combines SaaS service metrics with on-premises network visibility

Monitor Hybrid Environments Without Tool Sprawl

Your infrastructure doesn't stop at the firewall. Exchange Online runs alongside on-premises mailboxes. SharePoint splits between SaaS and local. User experience depends on both but troubleshooting means jumping between monitoring tools and manually piecing together what's broken.

See Office 365 Services alongside your on-premises infrastructure. Exchange Online health next to domain controller performance. Teams connectivity next to VPN metrics. Active Directory, DNS, and firewall data all in one view. No tool switching. No manual data reconciliation during incidents.

Microsoft 365 services, on-premises servers, and network devices monitored together
Track cloud authentication flows alongside Active Directory performance
Monitor hybrid Exchange, SharePoint, and identity scenarios end-to-end
Troubleshoot faster when cloud and on-prem dependencies interact
All metrics feed into dashboards, maps, and reports you already use

How PRTG Monitors Microsoft 365

PRTG combines Microsoft API integration, REST queries, and network-level Performance Monitoring to give you visibility beyond what the Service Health Dashboard shows. Customize monitoring depth, combine cloud metrics with infrastructure data, and automate alerts for scenarios that matter in your environment. PRTG's Microsoft 365 sensors connect outbound over HTTPS (port 443). You do not need any inbound firewall rules.

Microsoft Graph API Integration

PRTG authenticates to your tenant using Microsoft Entra ID (Azure AD) app registrations with OAuth 2.0. Configure tenant ID, client ID, and client secret in PRTG's credentials section. Grant delegated permissions (ServiceHealth.Read.All for service health, User.Read and Mail.Read or Mail.Read.Shared for mailbox access). PRTG queries Graph endpoints for service status, mailbox data, and subscription metrics. Supports automatic or manual OpenID Connect configuration. Token refresh happens automatically. You control permission scope through Azure AD role-based access. Global admin rights aren't required.

Service Status Monitoring

The Service Status sensor reports counts of operational services, issues, downtime, and warning states across your subscription. The Service Status Advanced sensor monitors a specific workload: choose from Exchange Online, SharePoint, Teams, Intune, and others. Add multiple instances to track different services. Both query the Service Health API to deliver the same data the Service Health Dashboard shows, but with your own alerting rules, thresholds, and historical tracking. Configure scanning intervals from 60 seconds for rapid detection to longer intervals when you don't need instant updates.

Mailbox Flow Monitoring

The Mailbox sensor connects to specific folders. It tracks total email count, newest and oldest message timestamps, and messages matching custom filter criteria. Want to filter by specific senders or subjects? Regex filtering is built in. This is especially useful for service accounts, distribution lists, or executive mailboxes where monitoring message flow patterns matters. Typical scanning intervals? 5, 10, or 15 minutes. Keeps API calls manageable without losing visibility.

Endpoint Connectivity Monitoring

PRTG's HTTP sensors (HTTP Transaction, REST Custom, Cloud HTTP) monitor reachability and latency for Microsoft 365 endpoints. You get response time data for URLs and IP ranges. Track authentication endpoint performance (login.microsoftonline.com), API availability, or page load times for SharePoint and Outlook Web Access. Combine with SNMP and Flow sensors to measure bandwidth consumed by OneDrive sync and Teams traffic. This network-level view helps you understand how connectivity issues affect user experience and complements cloud service monitoring.

Hybrid Infrastructure Integration

Add Office 365 Monitoring sensors to existing device groups using PRTG's auto-discovery, or create dedicated Office 365 device trees. Monitor DNS resolution for SaaS endpoints and Active Directory performance alongside cloud authentication metrics. All data integrates into the dashboards, maps, and reporting system you already use for network and server monitoring. No separate tools. No data exports.

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PRTG vs. Manual 365 Monitoring

FEATURE	Without PRTG Without PRTG	With PRTG With PRTG
Monitor service status in near real-time	Without PRTG Refresh the Service Health Dashboard every hour (or more), hope Microsoft's email notifications arrive before users complain, keep your own spreadsheet for historical tracking	With PRTG Automated checks every minute, alerts fire instantly when Exchange or Teams show issues, historical graphs built-in
Track individual mailbox and email flow	Without PRTG Log into each mailbox separately (security risk) or spend hours writing PowerShell scripts to query mailbox stats, build custom alerting logic, maintain scripts as your environment grows	With PRTG Configure mailbox, folder, and filter criteria in 5-10 minutes per mailbox, automatic alerts on stuck emails or unusual activity, no scripting
Unify cloud and on-premises monitoring	Without PRTG Open Microsoft 365 Admin Center for cloud, separate tools for Exchange/AD on-prem, another console for network bandwidth, manually correlate data across systems when incidents hit	With PRTG Add Microsoft 365 sensors to the same device groups as domain controllers and network switches, see Exchange Online and AD performance side-by-side, troubleshoot in minutes instead of hours
Monitor network connectivity and bandwidth to Office 365 endpoints	Without PRTG Deploy NetFlow analyzers, run packet captures, review firewall logs to identify Office 365 traffic patterns, manually cross-reference network performance with service status when users complain about slowness	With PRTG HTTP sensors track endpoint latency and response times, Flow/SNMP sensors measure OneDrive, Teams, and Outlook bandwidth, all metrics visible alongside service data in the same dashboard
Customize alerting and integrate with ticketing systems	Without PRTG Wait for Microsoft's email notifications (no threshold control, email-only, can't filter by service), notifications often arrive after help desk already has tickets	With PRTG Define custom thresholds per sensor, route alerts via email, SMS, push, webhook, or integrate with ServiceNow/Jira, multi-level escalation, 10-15 minutes setup

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We have found these sophisticated levels of monitoring to be highly effective, improving the end user’s experience of the systems and applications in use, giving us the opportunity to provide a proactive resolution rather than having the end user raise issues.

Saif Akil, Head of Service Management

Acurus

PRTG gives a birds-eye view of your network to troubleshoot problems or look at systems in their entirety that other solutions cannot – and I have looked at all of them.

Colin Metzler, Cybersecurity Analyst

Dayton Children’s Hospital

“Before PRTG, applications and hardware all gave messages, but all separately, so we had to search through hundreds of e-mails to find the problem. It was always only afterwards that we saw that something was going on within the infrastructure. To mitigate the issue, we also considered other software. PRTG stood out because of its user-friendliness, flexibility and minimal consultancy investment.”

Wim Vandenberghe, ICT Manager

Soenen Golfkarton

Paessler PRTG Network Monitor licenses & pricing

Choose the PRTG Network Monitor subscription that's best for you.

License Name	Price	License Details	Get started	Pricing Details
PRTG 500	^$200	per month paid annually	Buy now Buy now	Enough to monitor multiple aspects of 50 devices
PRTG 1000	^$358	per month paid annually	Buy now Buy now	Enough to monitor multiple aspects of 100 devices
PRTG 2500	^$742	per month paid annually	Buy now Buy now	Enough to monitor multiple aspects of 250 devices
PRTG 5000	^$1,300	per month paid annually	Buy now Buy now	Enough to monitor multiple aspects of 500 devices
PRTG 10000	^$1,642	per month paid annually	Buy now Buy now	Enough to monitor multiple aspects of 1000 devices

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Microsoft 365 Monitoring: Frequently Asked Questions

What Microsoft 365 Services can PRTG monitor?

PRTG monitors service status for Exchange Online, SharePoint Online, Teams, OneDrive for Business, Intune, and other Microsoft 365 services. You can track your overall subscription status, individual workload status, mailbox folder metrics, and connectivity to Microsoft 365 endpoints. If you're running a hybrid setup, PRTG also monitors on-premises Exchange, Active Directory, DNS, and network infrastructure right alongside your cloud services.

How does PRTG authenticate to Microsoft 365 for monitoring?

It uses Microsoft Entra ID (Azure AD) app registrations with OAuth 2.0. You'll create an app registration in your Azure portal, grant delegated permissions (ServiceHealth.Read.All, User.Read, Mail.Read or Mail.Read.Shared), then configure the tenant ID, client ID, and client secret in PRTG. Token refresh happens automatically. No user passwords get stored anywhere. You control permissions through Azure AD role-based access.

Can PRTG monitor individual user mailboxes in Microsoft 365?

Yes. The Mailbox sensor monitors specific folders, like inbox, sent items, custom folders, for email count, message age, and filter-matched emails. It's especially useful for shared mailboxes, service accounts, or executive inboxes. You decide which mailboxes to monitor and set your own thresholds for volume, message age, or sender/subject patterns.

Can I combine Microsoft 365 Monitoring with on-premises infrastructure in the same dashboard?

Absolutely. Add Microsoft 365 Monitoring sensors to the same device groups and maps where you're already monitoring on-premises servers and network devices. You'll see Exchange Online health status next to domain controller performance, or track Microsoft 365 metrics alongside your internet bandwidth usage. Everything feeds into the same alerting, reporting, and notification system.

How often does PRTG check Microsoft 365 service status?

You configure scanning intervals per sensor. The default for Service Status sensors is usually 60 seconds, but you can adjust it based on how quickly you need to detect issues. For mailbox monitoring, longer intervals (5 to 15 minutes) reduce API call volume. PRTG respects API rate limits and throttles automatically if it needs to.

What happens if Microsoft 365 has downtime? Will PRTG still report?

If the Service Health API goes down (rare, even during major outages), PRTG sensors will show a connection error or timeout. But PRTG keeps monitoring network-level connectivity to Microsoft 365 endpoints through HTTP or ping sensors, so you can still tell whether the problem is on Microsoft's side or your local network. During most Microsoft 365 disruptions, the Service Health API stays operational and PRTG reports the degraded state normally.