Calendar Synchronization Issue Caused by Microsoft Graph

• In some situations, OfficePlace may experience issues when synchronizing calendar data with Microsoft Graph. For certain mailboxes, Microsoft Graph may repeatedly return the same calendar data during synchronization and never complete the process. 
• This may cause calendar synchronization to take longer than expected or temporarily stop for the affected mailbox. The issue originates from Microsoft Graph and does not indicate a misconfiguration or error in OfficePlace. Customers who wish to learn more about the underlying Microsoft Graph issue can refer to the following Microsoft Learn discussion: Microsoft Graph calendar delta query infinite loop

Status: 

• OfficePlace includes internal safeguards to detect this behavior. When an endless sync loop is identified, the synchronization is safely stopped and automatically retried at a later time.
• Microsoft is aware of the issue, and we are actively monitoring updates to Microsoft Graph.
• We have now released a workaround in OfficePlace to reduce the impact of this issue. 
  The workaround is included in the latest version of OfficePlace currently running in production. See Revision History ver. 1.8 Hotfix 1
  This workaround is designed to handle most of the scenarios we have observed and should allow calendar synchronization to continue without getting stuck in an endless loop.
  However, due to the nature of the issue in Microsoft Graph, the workaround may not resolve all cases.
  If you still experience issues with calendar synchronization, we recommend contacting our support team for further investigation and assistance.
• As an alternative resolution, the issue can be mitigated by removing and recreating the affected resources in Microsoft 365. While this may resolve the problem, it requires administrative effort and may not be suitable for all environments.

Reference: #463854
Applies to: OfficePlace Connect, OfficePlace Group Calendar.
Last updated: May 6, 2026