In Office 365 we can easily import contacts from a CSV file vs having to create them 1 by 1. The first step in doing so is to connect to our Tenant using Azure PowerShell. To do this launch Azure PS as Administrator, you should get a window as shown below.

Launch Azure PS

The next step is to do the following:

  • Import-Module MSOnline
  • $UserCredential = Get-Credential
  • $Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri -Credential $UserCredential -Authentication Basic -AllowRedirection
  • Import-PSSession $Session

Import Modules

Once we run the second command it will prompt for user credentials. Enter your login info for O365 and click okay. You will be taken back to a prompt.

Import Exchange Modules

After we enter in the 3rd and then 4th command you will see the commands importing in O365.

Contacts blank

If we login to the Office Admin Center and expand Users -> Contacts we can see that we have no contacts listed for our domain. To import contacts from a CSV file we can run the command below:
Create multiple contacts This is the command run:

  • $New = Import-Csv C:\ExternalContacts.csv|%{New-MailContact -Name $_.Name -DisplayName $_.Name -ExternalEmailAddress $_.ExternalEmailAddress -FirstName $_.FirstName -LastName $_.LastName}

You can just change the file path to where your CSV file is stored.
Successfully run scriptOnce successfully run, it will take a few minutes depending on the number of contacts to create. You should be returned back to the prompt when done. If a contact does exist then you will receive red lines with errors saying the contact exists.
Contacts visible o365

If we refresh our contacts list, you can now see the ones that were imported.

From the Office Admin Center you cannot perform bulk options on contacts, if you wanted to delete all you would rather use the Shell vs the GUI.

Hope it helps.

By edward