Bug: Mobile Devices Missing After Upgrade (System.InvalidOperationException: Sequence Contains More Than One Matching Element)

Version Affected: 21.04, 22.02
Bug Number: N/A
Bug Status: Closed - Fixed
Fixed in Version(s): 21.04 HF11, 22.02 HF5, and by default from 22.12 onward

 

Overview

After upgrading, some users are missing mobile devices they had previously enrolled. The error log shows System.InvalidOperationException: Sequence contains more than one matching element.

 

Cause

A mismatch in on-premises data caused issues with the migration logic used during the upgrade.

 

Resolution / Workaround

Upgrade to 21.04 Hotfix 11 or 22.02 Hotfix 5 or later to resolve this issue — the fix is included by default from 22.12 onward.


 

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