Forum Discussion
Windows Defender ATP suddenly stopping Office add-ins from loading
We have had the exact same problem as you where an add-in just stopped working. What's worse is that it causes excel to constantly crash probably because ATP tries and stopping files loading and throws the whole program off.
Worse still I have been trying to get the exceptions working and it provides no results.
- It's a disaster for us levyfel.
It's now impacting all of our largest users and we cannot find any rational or explanation from Microsoft anywhere as to why this chance has been implemented and how we can address it, or whether it's a mistake that will be reversed in a future Windows Defender update.
Very frustrating and damaging stuff...Agreed, it would be one thing too if the exclusions were working. Some searching on the internet and this was the only complaint that I have found that fits the situation we are describing. I also found that my exclusions in Defender and then the Intune Policies do not carry over. Currently trying to do the same for some folder paths in Intune Policies under the Microsoft Defender Exploit Guard. Why there would be two ways to do the same thing I do not know. So far no luck though as it is still being blocked and then excel itself crashes and freezes.
I am at the point of disabling the block on Win32 API calls but I really really don't want to do that and I doubt it would even fix anything. Probably Microsoft people wont even see this thread...
- We're now trying removing the Win32 API calls from the VBA add-in within our broader platform as we're hoping this is all that's causing the block.
Would be great to understand why it's suddenly popped up though.