Guess that means I wont be even trying, thanks for the report :)

Did you try installing .net 8 before you ran the installation since 8720 now wants .net 8?

Hi echoDreamz!

I used the .EXE setup so I assumed that everything is managed by the setup, even the transition to .NET 8...

I don't know if I can risk installing it manually, because I don't want to have problems downgrading if it still doesn't work...

I am holding off, I did not see anything in the changelogs about the IMAP sync yammer folder issue, will wait :)

I didn't run into this error, but I did manually install .NET 8 (hosting bundle) first so maybe that's why, although I also assume the EXE installer is supposed to handle that for you if you don't do it yourself. As far as I know, you can have .NET 7 and 8 installed at the same time, which might make it safer in case you need to downgrade. I uninstalled 7 after updating SM, because I wasn't using 7 for anything else.

I am also on Windows Server 2019.

Also just in case it makes a difference: I also stopped the SmarterMail service, the SmarterMail IIS website, and the SmarterMail IIS application pool, and then uninstalled 8713, before installing 8720.

After installing .NET 8, I also restarted IIS because the .NET installer asked me to, although I don't know if it's 100% necessary (if you have IIS Manager, click the server, then click Restart on the right side; otherwise if I remember correctly the iisreset command line command handles it). Keep in mind this will bring down all sites on the server for a bit.

@echoDreamz the IMAP sync yammer folder issue was fixed for me in 8720!

@Nick, love you... thank you for testing and confirming... I may try it after all then, I always try and install the prerequisites myself anyways beforehand. I guess .net 7 is not required and can be removed and I will drop .net 8 in.

EDIT: Stopped IIS, SM, Removed SM, Removed net 7, rebooted, installed net 8, installed SM, all is good.

@echoDreamz Awesome, glad to hear it worked!

Then we can conclude the .exe installer doesnt work as expected.

Thanks for those new infos,  guys!

 I will try to install .net 8 today and then re-try the update.

More info after this new test.

@Brian Bjerring-Jensen Sounds like that's the case from what Gabriele said, but just to clarify my situation: I never attempted the 8720 install before manually installing .NET 8, so I don't know if it would have worked in my (or anyone else's) environment or not.

Hi Nick!

Can you just give me the link at the download you used to install .NET 8?

Thanks in advance

I confirm that with win 2019 it is necessary to manually install net8 before installing sm 8720

https://download.visualstudio.microsoft.com/download/pr/2a7ae819-fbc4-4611-a1ba-f3b072d4ea25/32f3b931550f7b315d9827d564202eeb/dotnet-hosting-8.0.0-win.exe

I confirm that after manually installing .NET 8 (hosting package) I was able to upgrade to SM 8720 and everything works

THX Kyle