Using powershell to disable O365 POP and IMAP from a user CSV list

Marvin Oco 

Consider the CSV file "Users.csv" which contains username (or upn) of users with the column header UserPrincipalName and try the below commands.

Import-Csv 'C:\Users.csv' | ForEach-Object {
Set-CASMailbox -Identity $_."UserPrincipalName" -PopEnabled $false -ImapEnabled $false
}

Marvin Oco You can use the Set-CASMailbox -Identity <UPN> -PopEnabled $false -ImapEnabled $false