Phone numbers from all users' contact information on outlook.

Question

Hello

Please i need your help on this issue

I would like to use PowerShell to remove phone numbers from all users' contact information on outlook.

Also to use PowerShell to add phone numbers for multiple users in Microsoft Entra.

Answer 1

Are the contacts Outlook contacts, or MS Exchange contacts (i.e., in the Active Directory)?

If they're in the AD you'd use Get-Contact and Set-Contact cmdlets, or Get-MailContact and Set-MailContact cmdlets.

If they're contacts created by mailbox owners you'll probably have to resort to using Invoke-RestMethod if the mailboxes are in Exchange Online (Example: https://gsexdev.blogspot.com/2014/04/oneliner-mailbox-access-in-powershell.html). If your Exchange is on-prem you'll some pointers here: https://www.undocumented-features.com/2019/07/16/some-of-the-many-ways-to-export-outlook-contacts/

Using Entra, you'll probably have to use the PowerShell Microsoft.Graph.Entra module.

Answer 2

Hello, @IniobongNkanga-8038,

Welcome to the Microsoft Q&A platform!

Based on your description, I understand that you want to learn how to use PowerShell to remove phone numbers from the contact information of all users on Outlook and add phone numbers for multiple users in Microsoft Entra.

After testing, you can realize deleting the phone numbers of all contacts at once with the following command in PowerShell.

1.Use the following command in PowerShell to get the current mailbox contact name and phone number.

Get-Contact | Select-Object DisplayName, Phone

2.Use the following command in PowerShell to get all contacts traversed and then delete their phone numbers.

$contacts = Get-Contact -ResultSize Unlimited
foreach ($contact in $contacts) {
    Set-Contact -Identity $contact.Identity -Phone ""
}

3. Use the following command in PowerShell to confirm that the phone numbers of all contacts have all been deleted.

Get-Contact | Select-Object DisplayName, Phone

Regarding Microsoft Entra, to better address your question, I will add a relevant tag to your post. Thank you for your support and understanding.

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Best Wishes,

Alex Zhang