Here is a list of issues that were fixed in this release - build 2.6.24.

Issue Key Description
AVSUPPORT-38724 Login operations performed through MSP portal were not logged. MSP portal and customer portal share trusted connection, which previously bypassed the auditing mechanism.
AVSUPPORT-37932 ClickTime Protection domain validation allowed invalid domain patterns, including the protocol (i.e. http/https).
AVSUPPORT-37462 Excluded users were not being excluded when policy scope was set to "All users and groups". The policy now does not present option to define exclusions.
AVSUPPORT-36571 A new customer experienced scanning issues, where not all emails were scanned. Issue was related to group filtering definitions not updating correctly.
AVSUPPORT-38889 When onboarding using the new O365 onboarding process, all users used to receive an email notifying that they had been added to the O365 group called avanan_inline_incoming.