Update error code 30088-27 Office 2021 what to do to get corrected????

I just ran an update and for the first time in months it completed without the error. The update confirmed that I was up to date. I didn't change anything. I assume that this was fixed at Microsoft's end.

I hope this fix sticks.

Same here thanks to Gunter Born and Great White North.

On my end, there was absolutely NO user intervention. I merely had to reboot, and the update worked without returning an error and this was on two machines running MS 365 and Windows 10 Pro.

Again, NO user intervention on my part; just random reboots on the machines and updates started working again.

FWIW, OneDrive has been uninstalled on both machines and all "connected services" have been disabled and, further, one machine is even running a preview build.

I just ran an update and for the first time in months it completed without the error. The update confirmed that I was up to date. I didn't change anything. I assume that this was fixed at Microsoft's end.

I hope this fix sticks.

User profile is not the cause ....

Even though someone reported that rolling back did not help, I will try it shortly.

First of all, Happy 4th to all US-based folks.

As I mentioned before, have been working for more than week with a 365 support agent, trying everything he has come up with. Now, he is in a retreat with other gurus trying to come up with another suggestion.

I have done all you guys have, including the removal of office using https://support.microsoft.com/en-us/office/about-the-microsoft-support-and-recovery-assistant-e90bb691-c2a7-4697-a94f-88836856c72f

As it was suggested by the agent. It took more than 2 hours for Office to be uninstalled and it did. It fix a thing for me.

My working theory at this point is user profile corruption. I needed to wait until today to gain access over the user’s PC. Will do that, and report my findings later.

Hello, users who are stuck in this thread and suffer from error code 30088-27, please forgive me for my previous misjudgment of this problem. Network reasons have been ruled out as possible causes. This problem has now become a hot topic in the community. In other threads, some users mentioned that this problem occurred after updating to Office version 17726.20126. If you encounter different reasons, please let me know through your reply.

Here is a solution that other users have tried and solved the problem for your reference. It comes from this thread. The problem is solved by disabling updates and rolling back the version of Office:

1. Roll back the Office version:
2. Check your Office version, open any Office component, and find your version in File-Account-About XXX.
3. Start the command prompt with administrator privileges (search cmd in the search box in the lower left corner of the desktop), then enter the following command and press Enter to execute.

    cd %programfiles% \Common Files\microsoft shared\ClickToRun
   

4. Enter the second line:

    Officec2rclient.exe /update user updatetoversion=16.0.XXXXX.XXXXX
   

Where the X part is replaced with the Office version, such as Build17425.20176.

You can find the historical version number of Office here:

Office2019 and 2016: Update history for Office 2016 C2R and Office 2019 - Office release notes | Microsoft Learn

Office2021: Update history for Office LTSC 2021 and Office 2021 - Office release notes | Microsoft Learn

Please check the above, and if you have any other questions or concerns,

We look forward to hearing from you.

Sincerest greetings

Linn |Microsoft Community Support Specialist