PPS issue with rcpt verification for few groups
I'm administring a F-Secure Protection server v8.
I'm facing an issue with recipient verification, for few of my groups, available into the PPS repository
All mails sent to them are bounced as the address is unknow.
It's very strange, because the issue is not for all groups.
I checked their properties, but I didn't notice any difference.
All the users & groups are imported from a LDAP directory (on a Exchange 2013 server).
Does someone already got this sort of issue ?
Thanks for your advices.