For redirection purpose, one can also use Azure static web app with routing rules. It would be a cheaper option compared to Front Doors.
SharePoint online custom URL

Hi,
Is it possible to add an (DNS ?) entry or something else to have a second URL for a specific SharePoint Online site collection?
For example, we have the following site collection: companyxyz.sharepoint.com/sites/support
Would it be possible to create or change something (network related?) so that users can use support.companyxyz.com?
We are migrating from a SharePoint on-premise to SharePoint Online, and for 1 specific site collection we want to have this setup (because there are a lot of links pointing to support.companyxyz.com)
Thanks.
6 answers
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Rohit Mishra 1 Reputation point
2022-07-08T21:05:08.993+00:00 Ian-WKIT 6 Reputation points2021-11-12T03:33:09.277+00:00 Surely a CNAME pointing to the sharepoint URL would suffice?
Edit Some googling suggests that it doesn't work
杨建宇 1 Reputation point MVP2021-02-20T07:32:55.493+00:00 I think you should add domain url in O365 Administrator
ChelseaWu-MSFT 6,241 Reputation points2020-09-07T01:58:37.457+00:00 Additional to the Answers above:
You can refer to the links below for detailed information on IIS HTTP Redirection and Front Door Service in Azure:
How to configure IIS HTTP Redirection in order to access Office 365 Resources via Custom Domain.
Front Door Service: URL redirect.Here are some other links of discussion on this requirement for your reference:
Internal DNS resolving external URL.
Friendly URLs with Office 365.
If an Answer is helpful, please click "Accept Answer" and upvote it.
**Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread. **Jeff Kirk 1 Reputation point2020-09-05T20:14:13.587+00:00 "Front Doors" is part of azure, so we've added a DNS entry to point to sharepoint urls to front door, which then translates it to whatever sharepoint site you want. Saves from the headache of an additional IIS server to do that for you.