As you're likely out of support now (as you sya you're no longer using SED), you could try the below options:
SymDiag: https://www.symantec.com/docs/TECH170752
This tool checks and repairs a range of Symantec products
https://www.symantec.com/docs/TECH204285
This links to the CLI options for SED. Try enumerating all the disks and checking everything that comes out, to see if there is a disk that is stll encrypted.
Obviously, if you are still under Support and Maintenance, then you may wish to log a support case.
@ Joshua Wardell, please open a new thread. SED and SEE are different products