Unified Communication Techies

M365 Secure score - Turn on the common attachments filter setting for Anti-malware on EOP This filter will help us to prevent certain types of files that are risker to send and receive via e mails. To make sur e these file types don't get through, enable the common attachment filter.   How to acces s -    https://security.microsoft.com/ then go to Policies & Rules > Threat policies > Anti-Malware It will have a long list  You can use the default list of file types or customize it.  Messages with the specified attachments types are treated as malware and are automatically quarantined.  Change notification status to different organization requirement. 

DNS Suffix , Internal DNS zones, External DNS (M365_UCTechiLab#5) - AD and Exchange 2016 Access the AD Server and DNS and Create new DNS Zone.  I would suggest to fix the it/DNS suffix add then you can verify by accessing the ADUC and create user  For DNS work in the Exchange and also AADConnect to verify UPNSuffix we should have domain in the both side of the ADs. AAD will have the automatically when we verify part of the tenant verification by adding a CNAME in public domain where you have domain records. Addition to that if you dont have this in AD DNS (On-Prem) then you will required to add.  Follow the steps and it will be straight forward in new environment and if you already using this domain in your exchange then this wont be a problem or not required to create.  Go to Active Directory Server (AD) > AD Domains and Trusts     Right click on top Active Directory Domains and Trust > UPN Suffixes and Add the UPN you required  Once you sa...