Hello
@radcommuk,
I have checked the V20 installation that you have and noticed that the System Owner email address was in our Blocked SMTP list with the below error, and removed it. Can you please check again?
Please do not provide here any email or License information.
19-05-2025 12:13:34 ~ 550 5.7.9 STOREDRV.Deliver; Recipient mailbox quarantined.; STOREDRV.Deliver.Exception:StorageTransientException.MapiExceptionMailboxQuarantined; Failed to process message due to a permanent exception with message Cannot open mailbox /o=RadcommUK/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Configuration/cn=Servers/cn=EXCHANGE-SERV19/cn=Microsoft System Attendant. 16.55847:8F000000, 17.43559:0000000036010000000000000000000000000000, 20.52176:020FDA8305000011BC000000, 20.50032:020FDA837517000000000000, 0.35180:00000000, 255.23226:67010000, 255.27962:FE000000, 255.17082:330A0000, 0.26937:80030400, 4.21921:330A0000, 255.27962:FA000000, 255.1494:80030400, 0.50608:77090000, 1.32848:04000000, 4.61416:330A0000, 1.56872:FE000000, 4.42712:330A0000, 8.45434:5142FA8DA8E34B40B02EA2223233A1996E67652D, 5.10786:0000000031352E30322E303938362E3030353A45786368616E67652D5365727631393A37363361306237392D363265302D343536612D383865652D383161643033663832663863000000000 0, 255.1 750:00000000, 255.27962:07000000, 0.26881:00000000, 255.21817:330A0000, 4.46042:330A0000, 0.32441:00000000, 4.1706:330A0000, 0.24761:00000000, 4.20665:330A0000, 0.25785:00000000, 4.29881:330A0000 [Stage: PromoteCreateSession]
If you keep having trouble logging in or receiving the Password Reset email, please open a ticket to our Support to investigate it further.