Please confirm you are running Veeam Backup for Microsoft 365 build 126.96.36.199 prior to installing this cumulative patch KB4187. You can check this under Help and Support > About in Veeam Backup for Microsoft 365 console. After upgrading, your build version will change to 188.8.131.52.
As a result of ongoing R&D effort and in response to customer feedback, cumulative patch KB4187 provides a set of bug fixes, the most significant of which are listed below:
To install the cumulative patch KB4187:
If there are any remote proxies in your environment, please update those as described here.
This form is only for KB Feedback/Suggestions, if you need help with the software open a support case