add 180 aliases to 1 365 mailbox

add 180 aliases to 1 365 mailbox
i have 1 mailbox in o365 exchange online
i need to add 180 aliases to this 1 mailbox
i dont want to have to add each one manually
is there anyway i can add all aliases to a csv file and import?
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William FulksSystems Analyst & WebmasterCommented:
Yes you can make a CSV and then use powershell to import it - Here's a blog post showing you how to format the CSV and import it -

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Saif ShaikhServer engineer Commented:

You can connect to O365 powershell with the tenant global admin credentials and run command:

Set-Mailbox mailboxname -EmailAddresses @{Add=''}  (This command is manual command)

We also have a powershell script:

Please download the script for the same from link:

Put all the names/addresses in a list and paste it in to Excel. Then concatenate the rest of the text on to each line using copy and paste. Save it as a test file with alias_addresses.txt

From power shell with admin right you need to run below command:

# .\Over_200_Aliases.ps1 -O365Admin -O365AdminPassword Password123 -Mailbox_Name mailbox1 -Mail_Addresses_File_Path "C:\Temp\ExoVoice\alias_addresses.txt"

# O365Admin - Administrator login ID
# O365AdminPassword - Administrator login password
# Mailbox_Name - mailbox with more than 200 aliases
# Mail_Addresses_File_Path - the pathe where the file with initial addresses list is saved e.g. email_addresses.txt
dougdogAuthor Commented:
could i just create a csv
what would my columns be
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William FulksSystems Analyst & WebmasterCommented:
Click the link I sent you and it gives the format. You can skip step 1 if you already have your aliases.
dougdogAuthor Commented:
is this what first line should look like and do i just paste in all aliases?

Name, ProxyAddresses,;
William FulksSystems Analyst & WebmasterCommented:
Here's a better detailed explanation of using a CSV to import into Office 365. The CSV would be formatted as Recipientname, emailaddress, aliasemailaddress
dougdogAuthor Commented:
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