Group Won’t Accept Mail From ‘Outside’
KB ID 0001771 Problem Exchange has been this way for a long time here’s me explaining this very problem with older versions of Exchange. If you create a ‘Group’, be that a Distribution Group, or a ‘Microsoft 365′ Group, the default setting is to NOT ALLOW mail from anyone outside your organisation. If you attempt to send mail to that group you will see errors like these; Errors; 550 5.7.133...
Locate your FSMO Role Servers
KB ID 0000221 Problem You would like to know which servers are holding which roles. To move your FSMO Servers CLICK HERE Solution FSMO Servers There are five FSMO (Flexible Single Master Operations) Roles that need to Exist in a Windows AD Forest. PDC Emulator (One per domain) RID Master (One per domain) Schema Master (One per forest) Domain Naming Master (One per forest) Infrastructure Master (One per domain) But I’ve Googled...