I've developed a Site Collection for one client of mine (custom pages, webparts, lists, libraries modified master pages, customized settings, custom people groups, SPD workflows etc.).
Now I have another client that requires the completely same Site Collection (another branch of the company) on another Office 365 tenant.
I am wondering what would be the best way of migrating everything as it is, so I don't lose any of the data/configuration.
Could somebody please advise me on this?
Thanks in advance!