Acronis Backup Cloud: Office 365 backups still run after being revoked

Previously, you had Acronis Agent for Office 365 installed on the machine and performing backups. Now you use the cloud Agent and have revoked all plans from the old local agent. However, you get this error:

Error code: 113
Module: 307
LineInfo: 0xC37471CEFFA1827A
Fields: {"$module":"agent_protection_addon_vsa64_12420"}
Message: Selected Microsoft Exchange mailboxes were not found: Mailbox with ID 'arx://is/XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX'
Mailbox with ID 'arx://'
Mailbox with ID 'arx://'