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

In the interim, nothing seems to be working anyway so these efforts appear to be futile. They deleted an entire thread related to this error and the only suggestion they can muster is to roll back to a version that was released in May. No thanks!

The fact that their only 'solution' is to tell people to "roll back" to the May update (ie. Version 2405, Build 17628.20110) tells me (and everyone else) three things. First, that they are aware...extremely aware...of the problem. Second, that they know EXACTLY which update caused the problem (which also means they probably know exactly which coding changes led to the problem). And, third, that they have NO intention to fix the problem. As I said in my last comment, their ONLY concern right now is finishing up Office 2024, and getting it released. I'm willing to bet that at least 95% of the Office team is working on Office 2024, with less than 5% of the team left to 'update' previous versions.

Unfortunately, this is how Microsoft operates. Whenever they are getting close to releasing a new retail version (meaning, not just a "major update" of an already-released product) of something, they seriously slack-off in everything related to older versions of that product. They shift as many people as possible t the 'new' project, leaving nothing more than a "skeleton crew" to manage any problems with said older products. Microsoft has followed this SOP for many years...although, it has also gotten much worse since Bill Gates stepped down as CEO. When he was in charge, problems like this rarely happened.

BTW, did you just uninstall it or did you do something else? I just uninstall it from Apps.

I did not uninstall & reinstall, as I didn't want to deal with the 'activation' thing all over again (as I have installed it on several computers (ALWAYS uninstalling on the 'old' before installing on the 'new), I can no longer do "online" activation...I have to do "phone" activation). With Office 2021 installed, I just re-installed over the previous updated version. However, as I mentioned, even though this DID update Office to the most recent version, the 'error' message STILL appears when checking for updates. As such, it can be safely assumed that the code causing the problem is NOT part of the changes in the code for the most recent update, nor from the previous two updates. The code change causing the problem had to be from 3-4 versions ago (ie. Version 2405, Build 17628.20144 or Build 17628.20164). This is where Micrsoft programmers NEED to look...but, as many have already surmised, Microsoft probably doesn't care, and they are not truly trying to fix the problem...especially knowing that Office 2024 (the ONLY thing the Office team is TRULY concerned with) is set to be officially announced next month, and released before the end of the year.

I decided to try updating my C2R Office, and it all went smoothly as usual.

No error messages, and ended up with Version 2407 (Build 17830.20138 Click-to-Run) as hoped for.

For what it's worth:

1. I'm on the "Current Channel", and

2. "Options, General, Privacy Settings, Turn on all connected experiences" is selected

Yes, you'd think an installed, perpetual product would have its help files also installed but I guess that's no longer the case.

Regardless, I just noticed that my (purportedly online "click-2-run") version of Microsoft 365 is consuming well over 3 Gigs of space on my SSD so there's that.

Is that what "click-2-run" means? My Office 2019 is also labeled "click-2-run", and it had better not be online.

I figured it simply referred to the fact that I click a desktop icon or a Start Menu item to run it -- like everything else in Windows for the past 35 years.

BTW, the reference to "Microsoft 365" might be because there's a trial version on my PC that I don't touch. But I assume that I've got a full standalone non-subscription version of 2019 that I paid for when I bought this PC.

and the miracle is over .... our 3 PCs are now here when updating ... I have not even search for it.... I understand Microsoft is not looking over us ... but the MVPs do have a way to seek for help. Time to use it. O365 support is clueless .... so, who do we have to call?

Maybe start throwing garbage at them via social media?