If you heard this, you are ahead of the game! Information has been slow to be shared with borrowers, but the following servicers are migrating in late 2021/early 2022: Fedloan Servicing, American Education Services (AES), Navient, and Granite State Management & Resources (GSMR). In some cases, the first you may hear of this is after your loans have already been migrated.
Once you have migrated, you will want to set up your new account with your new servicer. Uniquely, Aidvantage will be set up with your current Navient credentials automatically. Once you have registered your new account, you can connect this new servicer via Spinwheel.