Some admins may receive failures creating or updating Communications Compliance policies in Microsoft Purview

Title: Some admins may receive failures creating or updating Communications Compliance policies in Microsoft Purview User impact: Admins may have received failures creating or updating Communications Compliance policies in Microsoft Purview. More info: Impact was limited to Communications Compliance policies with more than four classifiers. Final status: The fix deployed to the whole of the affected infrastructure, and we've confirmed with our internal monitoring telemetry that impact is remediated. Scope of impact: Some admins may have received failures when they created or updated Communications Compliance policies in Microsoft Purview with more than four classifiers. Start time: Monday, July 6, 2026, at 12:00 AM UTC End time: Friday, October 9, 2026, at 6:00 PM UTC Root cause: A service update which intended to add operations with larger data sizes introduced a code error, causing size limitation issues. Next steps: We're reviewing and improving our service update validation procedure to prevent similar issues from occurring again in the future. This is the final update for this event.

Title: Some admins may receive failures creating or updating Communications Compliance policies in Microsoft Purview User impact: Admins may receive failures creating or updating Communications Compliance policies in Microsoft Purview. More info: Impact is limited to Communications Compliance policies with more than four classifiers. We advise admins to keep classifiers to a maximum of four during this time. Current status: We've completed the deployment to over 90 percent of the affected infrastructure. While most admins should see relief, we expect the release to complete by the next scheduled update. Scope of impact: Some admins may receive failures creating or updating Communications Compliance policies in Microsoft Purview with more than four classifiers. This section may be updated as the investigation progresses. Root cause: A service update which intended to add operations with larger data sizes introduced a code error, causing size limitation issues. Next update by: Monday, October 12, 2026, at 6:00 PM UTC

Title: Some admins may receive failures creating or updating Communications Compliance policies in Microsoft Purview User impact: Admins may receive failures creating or updating Communications Compliance policies in Microsoft Purview. More info: Impact is limited to Communications Compliance policies with more than four classifiers. We advise admins to keep classifiers to a maximum of four during this time and we anticipate the limit to be remediated by Monday, October 5, 2026. Current status: We've continuing to monitor the deployment of our fix which remains scheduled to complete by Monday, October 5, 2026. Scope of impact: Some admins may receive failures creating or updating Communications Compliance policies in Microsoft Purview with more than four classifiers. This section may be updated as the investigation progresses. Estimated time to resolve: We anticipate impact to be remediated by Monday, October 5, 2026. Root cause: A service update which intended to add operations with larger data sizes introduced a code error, causing size limitation issues. Next update by: Tuesday, October 6, 2026, at 6:00 PM UTC

Title: Some admins may receive failures creating or updating Communications Compliance policies in Microsoft Purview User impact: Admins may receive failures creating or updating Communications Compliance policies in Microsoft Purview. More info: Impact is limited to Communications Compliance policies with more than four classifiers. We advise admins to keep classifiers to a maximum of four during this time and we anticipate the limit to be remediated by Monday, October 5, 2026. Current status: We've completed internal validations for our solution and have begun its deployment. Our fix deployment timeline projects the deployment will remediate the impact by Monday, October 5, 2026. Until this time, we advise users to keep Communications Compliance policies limited to under four classifiers in order to avoid impact. Scope of impact: Some admins may receive failures creating or updating Communications Compliance policies in Microsoft Purview with more than four classifiers. This section may be updated as the investigation progresses. Estimated time to resolve: We anticipate impact to be remediated by Monday, October 5, 2026. Root cause: A recent update introduced operations with larger data size included a code error, causing size limitation issues. Next update by: Tuesday, September 29, 2026, at 6:00 PM UTC

Title: Some admins may receive failures creating or updating Communications Compliance policies in Microsoft Purview User impact: Admins may receive failures creating or updating Communications Compliance policies in Microsoft Purview. More info: Impact is limited to Communications Compliance policies with more than four classifiers. We advise admins to keep classifiers to a maximum of four during this time and we anticipate the limit to be remediated by Monday, October 5, 2026. Current status: We've received reports from a subset of affected admins who have reported receiving size limitation failures when creating or updating Communications Compliance policies in Microsoft Purview. We've isolated that a recent update introduced operations with larger data size included a code issue, causing size limitation issues. We've created a code fix to address the issue, which we anticipate being fully deployed by Monday, October 5, 2026. During this time, we advise users to keep Communications Compliance policies limited to under four classifiers in order to avoid impact. Scope of impact: Some admins may receive failures creating or updating Communications Compliance policies in Microsoft Purview with more than four classifiers. This section may be updated as the investigation progresses. Estimated time to resolve: We anticipate impact to be remediated by Monday, October 5, 2026. Root cause: A recent update introduced operations with larger data size included a code error, causing size limitation issues. Next update by: Monday, September 28, 2026, at 6:00 PM UTC

Title: We're looking into a potential problem impacting Microsoft Purview User impact: We're checking for potential impact to your users. Current status: We're investigating a potential issue with Microsoft Purview and checking for impact to your organization. We'll provide an update within 30 minutes.