Office 365 portals language
Hello,
When using a worldwide Office 365 tenant, you have some challenges about the portals & web pages languages. Indeed, each tenant has a “default language”, but for big companies that span through different countries, we need a more granular setting.
Microsoft offer some ways to tune the language.
Office 365 portals language for the tenant

Cloud Only accounts
- PowerShell with MSOnline PowerShell module
- Set-MsolUser -UserPrincipalName admintenant@itfordummies.net -PreferredLanguage EN-US
- PowerShell with AzureAD PowerShell module
- Set-AzureADUser -ObjectId admintenant@itfordummies.net -PreferredLanguage EN-US
Synced accounts
- ActiveDirectory “preferredlanguage” attribute
- Set-ADUser -Identity BB8 -OtherName @{‘PreferredLanguage’ = ‘EN-US’}
Web portal URLS
- Exchange Online ECP
Notes
- UsageLocation from AD or AzureAD does not impact language, it impact features that may not be accessible in some countries.
- msExchUsageLocation from AD does not impact Office 365 language, it impact features that may not be accessible in some countries
This is not an exhaustive list, feel free to comment with your own tips & tricks about Office 365 language.