Contact Objects and Primary SMTP address changes

Question

We are going to be changing the primary SMTP address on a large number of contact objects. Does anyone know if simply removing the SMTP address of contacts will cause any issues?

Answer 1

Hi,
Please confirm if the “contact objects” in your posting mean the
Mail Contact in Exchange. Generally, the Primary SMTP address for the mail contact is the external email address for the contact.
If you want to change it to a different external email address, we can use EMS with "-PrimarySmtpAddress" parameter to change it. If you want to change the primary SMTP address for multiple mail contacts, we can create a .csv file with all changed
external e-mail addresses for these contacts. Then imports and uses the data in the .csv file to set the mail contact.
Import-CSV "C:\ChangedContacts.CSV" | ForEach-Object {Set-MailContact -Identity $_.Name -PrimarySmtpAddress $_.EmailAddress -EmailAddressPolicyEnabled $False}
Regards,
Winnie Liang
TechNet Community Support