SCCM Inplace OS Upgrade Issue

[ITGURU]

Normally i would clean install servers, but as SCCM is quite well setup, I thought i would do an inplace OS upgrade as its the last server I have on 2016, so did an inplace upgrade to 2019.

The only thing which doesnt work after the upgrade is the WDS Service, It won't start with the error 'an error occurred while try to initialise multicast manager. If i open the WDS console its got a red x against the server.

when boot a client, it gets an IP but then fails to load the WDS./TFTP

I've reverted back the VM from a backup and see that the service is normally started and everything works as normal.

Anyone else come across this or can advise on solution? Online says that inplace upgrades are supported on SCCM servers.

Alternatively if i have to do a clean install, where can i find the best guide for this?

thanks.

[Davit2005]

Could you try and remove the WDS feature then re add it after inplace upgrade?. Make a note of what Images are used, etc. and where they are and backup if possible. You can always revert back to backup again it it still don't work?