Failed to send notification

Failed to send notification

I am currently stuck on Build 9415 as any future update seems to break the sending of notifications. I noticed in 1 of the patches it said it fixed the issue when Office 365 was involved, however I still have the issue. I apply each patch in the hope that i'll be able to send notifications after the update, but it keeps failing so I keep reverting to my previous VM snapshot so I can work again.

I'm only a free user so unable to use the support feature in ServiceDeskPlus so any assistance here would be great

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