want to restrict sender for a mail enabled security group

Question

Hi All,

I want to restrict who can send email to a mail enabled distribution group, but I get error when I try to add sender list.

I do not have a on-premise exchange server, but i have domain controller

I have 2 domain controller on premise and O365 exchange on cloud

As per this link

https://blog.thealpaca.gg/2021/10/05/extend-active-directory-schema-to-include-exchange-attributes-for-office-365/?unapproved=2&moderation-hash=d69390109246709ae461e94407930c5f#comment-2

if i download Exchange Server 2019 (KB5003612): https://www.microsoft.com/en-us/download/details.aspx?id=103241

and run the command

.\Setup.EXE /PrepareSchema /IAcceptExchangeServerLicenseTerms

Is it going to create any trouble for DC or domain users? basically i want to avoid a downtime on Monday

Regards,

Alex