Yes, Office-to-Office migration is possible. There are several scenarios for migrating office to office such as rebranding, merger, acquisition, and many more. your reason can be from anyone or else. I have tried to migrate my Office 365 to Office 365 after upgrading the plan. I have tried several ways but did not get any results. At last, I tried the Office 365 Migration tool to get the expected results. It required some steps only.

1. Download and Install the tool.
2. Select the data for migration.
3. Enter the Source and destination Email ID and Application ID.
4. Enter the Source Email ID and Application ID.
5. Select the users and Start Migration.

Office to Office migration is possible?

If you want to merge or combine the PST files then use the Outlook PST Merge Software. This tool supports all of browsers. It is capable of merging as well as joining the PST files. You can merge or join the PST file either in ANSI or UNICODE format. Your data will not be lost or damaged throughout the merging process. It will keep your data safe and secure.

If you are looking for the best splitter then the one and only is SysTools PST Splitter Tool. It is having all of the features that users required like you can split your PST file on the basis of size, year, date, folder, and email etc. It is taking care of the data security throughout the process of splitting. This is the tool that helped me a lot when I was searching for this problem.