Resizing an Azure or Windows 365 Cloud VM fails with WSSA

Products

• Cloud Secure Web Gateway - Cloud SWG

Issue/Introduction

Resizing an Azure or Windows 365 Cloud VM fails with WSSA installed on the VM.

If I uninstall the WSS Agent (WSSA) from the VM, the resize action succeeds.

Notes: 
- The error does not popup right away
- The error takes about an hour (or more) to popup in the Windows 365 management console
- The error appears after the VM resizing is complete (or near completion)

Resolution

The error that appears in the Windows 365 management console is: 

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Status
Failed provisioning

An unknown error occurred during resize.
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In reviewing the back-end logs for the Windows 365 portal, the error that was shown was: 

CheckVMAgentStatus_originalVMAgentUnavailable

 

Also, we noticed that there were messages about: 

Using fabric URI http://168.63.129.16

GetVersions() failed with exception ...Response status code...: 503

 

In researching what this IP address was, we found these two Microsoft docs: 

What is IP address 168.63.129.16?

Troubleshoot restore point failures

...which states:
"If you've blocked access to 168.63.129.16 using the guest firewall or with a proxy, extensions will fail."

 

To resolve the issue, we added that one IP address to the WSSA Bypass List, and the VM was able to be resized successfully: 

168.63.129.16