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Attempting to enable a user for Unified Messaging in Exchange Server 2016 fails with: “Extension xxxx is already assigned to another user on the dial plan UMDialPlan or on an equivalent dial plan.”

Problem You attempt to enable a user for Unified Messaging in Exchange Server 2016 but receive the following error: Extension xxxx is already assigned to another user on the dial plan UMDialPlan or on an equivalent dial plan. You know that this extension was previously

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Installing .NET Framework 4.7.1 on Windows Server 2016 as a prerequisite for patching Exchange 2016 CU8 to CU12 remains stuck at: “File security verification: All files were verified successfully.”

Problem You’re attempting to patch an Exchange Server 2016 CU8 environment to the latest CU12 and one of the prerequisites is to install .NET Framework 4.7.1 so you proceed to download the offline installer executable but notice that it never completes. Solution As with my

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Installing .NET Framework 4.7.1 on Windows Server 2012 as a prerequisite for patching Exchange 2016 CU8 to CU12 remains stuck at: “File security verification: All files were verified successfully.”

Problem You’re attempting to patch an Exchange Server 2016 CU8 environment to the latest CU12 and one of the prerequisites is to install .NET Framework 4.7.1 so you proceed to download the offline installer executable, run the install but notice that it remains stuck at:

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Attempting to upgrade Exchange Server 2016 from CU8 to CU12 fails at Step 2 of 18 Stopping Services with: “fms (1428)” because of the following error: Access is denied

Problem You attempt to upgrade an Exchange Server 2016 environment at CU8 to CU12 but the process fails at Step 2 of 18: Stopping Services with the error: Error: The following error was generated when “$error.Clear(); & $RoleBinPathServiceControl.ps1 -Operation:DisableServices -Roles:($RoleRoles.Replace(‘Role’,”).Split(‘,’)) -SetupScriptsDirectory:$RoleBinPath; & $RoleBinPathServiceControl.ps1 -Operation:Stop -Roles:($RoleRoles.Replace(‘Role’,”).Split(‘,’))

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