Myself and one of my colleagues are at the moment attempting to use our Windows 10 OSD task sequence, which we modified for CMG use (so no domain join etc), and first time around it worked and completed for my colleague, which was pleasing.
However, over the last few days, whenever we try the same OSD task sequence, smsts.log frequently shows error 80072efe - which translates to "The connection with the server was terminated abnormally." This appears to be at random points when downloading a file in a package or application, so is never the same file, but produces a failure which eventually shows as error 80070002 when the task sequence exits with an error - "the system cannot find the specified file."
The downloads appear to be coming from the blob part of the storage on the CMG DP, which is expected behaviour. I see the error more often if multiple small files are downloading as part of a package or application.
Setting the task sequence variable SMSTSDownloadRetryCount to 5 does allow for retries of content, but it appears to start the retry of the whole content, not just the file where it had failed, so it can often fail again even before it get so the point of continuing. Even adding the additional task sequence variable SMSTSDownloadRetryDelay set to 30 (so 30 seconds before retry) didn't make a difference.
Other things I've checked:
Redistributing the content back to the CMG's DP
Removing and distributing the content to the CMG DP
The CMG is functioning normally and checking the connection analyzer shows all is well.
The Windows PE boot image for the TS is the same as before when it worked.
My colleague who had the success also sees similar failures, and there's no networking changes at their end either.
Due to its somewhat random nature of failing to connect, is there anything worth checking on the CMG side to ensure that it successfully authenticates the content request and services it without any issues, or are there issues with Azure Storage at present where the CMG DP is (the option to use the CMG as a DP and use cloud storage is enabled) which might be causing the problem?