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It has happened once out of the five builds I've done today

how are you executing pulumi? This sounds like `az login` token expired? 

I'm executing it with CLI authentication, which from what I understand shouldn't be a problem: <https://github.com/pulumi/pulumi/issues/2644>

CLI works as expected, but I have seen processes time out because my auth token has expired. 
ARM, terraform and also pulumi. 

Check out <https://docs.microsoft.com/en-us/azure/active-directory/develop/active-directory-configurable-token-lifetimes>

Thanks, I'll check that out. I had a feeling that it wasn't actually Pulumi's fault.

I will say however that I haven't seen this happen with ARM or Terraform for the same infrastructure.

It sounds like the underlying terraform provider here may not be dealing with refresh tokens correctly 

I _have_ heard of this being reported there (a while back). Is there an issue on Pulumi-azure tracking this <@UHKKB1335>?

`az account get-access-token` does the trick

<@UB8A66MPS> fwiw - here’s the issue Josh has opened on this which has a few more details: <https://github.com/pulumi/pulumi/issues/2644>

Thanks. I suspect I know what is causing this, looking into it shortly

Thanks a lot, let me know if there's anything I can do to help