[Mac OS Big Sur breaks Exchange connectivity (KESB 11.1.0.210)]

That's a shame. 

The response i’ve had from Support is to take video screenshots and capture lots of trace files. Unfortunately this is going to take me a while.

[Mac OS Big Sur breaks Exchange connectivity (KESB 11.1.0.210)]

Trace logs for my issue have been sent to Kaspersky Support. 

@northunder were you able to install 11.0.1 on Big Sur? I tried and just got a “Starting” splash screen on the KES application. If I could install it and it work then I would use that instead. 

You can’t even download that installer locally from Kaspersky anymore. Maybe it was remote install that didn’t work. 

 

Edit:

Try adding the following two to Trusted Applications, this has allowed attachments to work.

/Applications/Microsoft Outlook.app/Contents/MacOS/Microsoft Outlook

com.microsoft.Outlook

 

 

[Mac OS Big Sur breaks Exchange connectivity (KESB 11.1.0.210)]

We’ve not had the exact same issue as you but something with Outlook. 

We have just upgraded our only Mac to Big Sur, installed KES 11.1.0.210 & Outlook 2019. Outlook connects fine and send’s and receives emails, but as soon as you send an email with a large attachment (25mb for example) it will just not send and causes an Outbox block. As soon as you quit KES, it will send. 

I have also tried disabling components of KES (1 by 1) etc and it didn’t make a difference. 

I have a ticket opened this morning under INC000012188263

I did want to try adding Outlook to the trusted apps, but I don’t know where to find the paths required.