`Update-AzTag -Operation Replace` returns success but does not replace tags for some resource types

[o-l-a-v]

Description

This is likely an Azure API issue, more than an issue with PowerShell, but I'll just start here in case.

I use Update-AzTag -Operation Replace -Tag @{New=Tags;etc} to update tags on some Azure resources, mostly to fix casing, remove whitespaces etc. But for certain resource types, the command returns success, but tags does not actually get updated. This is especially aparent when replacing existing tags where only case on tag name has changed. Resource types where I've noticed this kind of behavior:

• Microsoft.Compute/virtualMachines/extensions
• Microsoft.Compute/virtualMachineScaleSets
• Microsoft.DocumentDB/databaseAccounts
• Microsoft.Insights/autoscalesettings

Relevant resources / documentation, confirming these resource types are taggable:

• Tag support for Azure resources
• Tag limitations

Concrete example:

• Cosmos DB account Microsoft.DocumentDB/databaseAccounts with tag @{'Costcenter'=1234}.
• I want to change it to @{'CostCenter'=1234}.
  • Update-AzTag -ResourceId $ResourceId -Operation 'Merge' -Tag @{'CostCenter'='1234'}
  • Update-AzTag -ResourceId $ResourceId -Operation 'Replace' -Tag @{'CostCenter'='1234'}
• Both -Operation Replace and -Operation Merge returns success, but tag stays the same.

Issue script & Debug output

^

Environment data

Name                           Value                                                                                                                                                                        
----                           -----                                                                                                                                                                        
PSVersion                      5.1.22621.1                                                                                                                                                                  
PSEdition                      Desktop                                                                                                                                                                      
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}                                                                                                                                                      
BuildVersion                   10.0.22621.1                                                                                                                                                                 
CLRVersion                     4.0.30319.42000                                                                                                                                                              
WSManStackVersion              3.0                                                                                                                                                                          
PSRemotingProtocolVersion      2.3                                                                                                                                                                          
SerializationVersion           1.1.0.1

Module versions

Name         Version
----         -------
Az.Accounts  2.7.6  
Az.Compute   4.26.0 
Az.Resources 5.6.0

Error output

No response

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @rthorn17.

Issue Details

---

Description

This is likely an Azure API issue, more than an issue with PowerShell, but I'll just start here in case.

I use Update-AzTag -Operation Replace -Tag @{New=Tags;etc} to update tags on some Azure resources, mostly to fix casing, remove whitespaces etc. But for certain resource types, the command returns success, but tags does not actually get updated. This is especially aparent when replacing existing tags where only case on tag name has changed. Resource types where I've noticed this kind of behavior:

• Microsoft.Compute/virtualMachines/extensions
• Microsoft.Compute/virtualMachineScaleSets
• Microsoft.DocumentDB/databaseAccounts
• Microsoft.Insights/autoscalesettings

Relevant resources / documentation, confirming these resource types are taggable:

• Tag support for Azure resources
• Tag limitations

Concrete example:

• Cosmos DB account Microsoft.DocumentDB/databaseAccounts with tag @{'Costcenter'=1234}.
• I want to change it to @{'CostCenter'=1234}.
  • Update-AzTag -ResourceId $ResourceId -Operation 'Merge' -Tag @{'CostCenter'='1234'}
  • Update-AzTag -ResourceId $ResourceId -Operation 'Replace' -Tag @{'CostCenter'='1234'}
• Both -Operation Replace and -Operation Merge returns success, but tag stays the same.

Issue script & Debug output

^

Environment data

Name                           Value                                                                                                                                                                        
----                           -----                                                                                                                                                                        
PSVersion                      5.1.22621.1                                                                                                                                                                  
PSEdition                      Desktop                                                                                                                                                                      
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}                                                                                                                                                      
BuildVersion                   10.0.22621.1                                                                                                                                                                 
CLRVersion                     4.0.30319.42000                                                                                                                                                              
WSManStackVersion              3.0                                                                                                                                                                          
PSRemotingProtocolVersion      2.3                                                                                                                                                                          
SerializationVersion           1.1.0.1

Module versions

Name         Version
----         -------
Az.Accounts  2.7.6  
Az.Compute   4.26.0 
Az.Resources 5.6.0

Error output

No response

Author:	o-l-a-v
Assignees:	-
Labels:	Service Attention, bug, ARM - Tags, customer-reported
Milestone:	-

[jordanmills]

I'm seeing this issue too. It seems hard to believe that nobody else has run into it.

[chaoqi]

I am also facing this issues... this command Update-AzTag does not fully work even it shows all successful... please fix it thank you very much

[mcdonamw]

Anything going on with this? I've noticed this too, even when using the portal and simply trying to change case. It seems as if you cannot simply change case for an existing tag. You must first rename the tag to something else, and rename back with the desired casing. Or simply delete and recreate.

Note: It's been a few weeks since I've done this, but IIRC the tagValue is case-sensitive. If you try to delete a tag without matching case on the tagValue, it will still appear to be successful, but it will not remove it.

[scr8er]

It also affects subscriptions.