Why original site URL is required while setting up cross site connection - Custom domain

What is original Atlassian site URL? Why it is required to setup cross site connection?

• Original Atlassian site URL is like ( https://example.atlassian.net/wiki )

• Revyz uses Atlassian APIs to back up and restore data. These APIs rely on the original base URL of your site.

• When setting up a cross-site connection, you must enter the original site URL to ensure a seamless connection and data transfer.

Where do you get original Atlassian site URL?

• Go to admin.atlassian.com

• Go to Products URLs in left navbar

• Check Default URLs