Is It Necessary to Regularly Update the BitLocker Recovery Key?

Glad to answer your questions. The BitLocker recovery key will not be updated automatically and I think you don't need to update it regularly. Actually, The BitLocker recovery key is generated in the process of encrypting and it is unchanged until you change it manually.

Way to Change BitLocker Recovery Key

For personal users, you can change the BitLocker recovery key by re-encrypting the drive. Please note that this operation will take a long time. Here are the detailed steps.

Step 1: Search "BitLocker" in the Windows search bar, and select Manage BitLocker from the appeared results.

Step 2: Decrypt the drive by locating to the corresponding drive and clicking the Turn off BitLocker option.

Note: If the encrypted drive is locked, you need to unlock it before turning off BitLocker.

Step 3: Wait for the decryption to complete.

Step 4: Turn on BitLocker again and a recovery key will be generated.

Caution: Don't forget to back up the new recovery key to a secure location.

Conclusion

In summary, I recommend that you only update your recovery key when you suspect it has been compromised, since both decryption and encryption can take a long time. I hope this information is helpful to you.