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ºÚÁϺ£½Ç91Èë¿Ú uses a service account on macOS systems to let users unlock FileVault encryption. When you install the ºÚÁϺ£½Ç91Èë¿Ú agent on a macOS system, it silently creates this system account to:

• Provide new users with SecureTokens to authorize FileVault access.
• Rotate the FileVault Recovery Key when using the ºÚÁϺ£½Ç91Èë¿Ú macOS FileVault 2 Policy.

The service account provides security-level services to other ºÚÁϺ£½Ç91Èë¿Ú managed user accounts and has the following restrictions:

• It can't be logged in by other users.
• It doesn't have an accessible password.
• It doesn’t have a valid home directory.

If you’re installing the ºÚÁϺ£½Ç91Èë¿Ú Mac agent and encounter a failure to create the service account, it may be due to the service account’s restrictions.

Known Issue: MDM Password Policy Conflict

Under all of the following conditions:

• You register your Apple Mobile Device Management (MDM) server of choice as something other than ºÚÁϺ£½Ç91Èë¿Ú (some other solution you use alongside ºÚÁϺ£½Ç91Èë¿Ú).
• You apply an MDM password policy.
• The system is running macOS system version 10.13 or higher.

The ºÚÁϺ£½Ç91Èë¿Ú Service account fails to be created.

Cause
The ºÚÁϺ£½Ç91Èë¿Ú Service Account generates a very long random password, so when your MDM solution tries to apply a complex password policy, the random password may fail and stop the account from being created.

Resolution
We know this is an issue and are working to resolve it. In the meantime, we recommend you use one of the following workarounds:

• Remove the macOS system from the MDM policy.
• Remove the policy.
• Register ºÚÁϺ£½Ç91Èë¿Ú as your MDM server of choice with Apple.

Keep in mind that Apple only allows an organization to register one MDM solution.

Known Issue: Invalid Status

A macOS device might have an Invalid status because of any of these situations:

• No service account
• Service account has no secure token
• Secure token is invalid due to an invalid local or disk password

Cause
ºÚÁϺ£½Ç91Èë¿Ú has identified a problem on certain macOS devices where the ºÚÁϺ£½Ç91Èë¿Ú Service Account is unable to perform necessary tasks related to user management. If the service account is not repaired on these devices, future users added to the machine will not be able to decrypt the disk successfully during login and the ºÚÁϺ£½Ç91Èë¿Ú agent will be unable to successfully take over existing accounts. Some devices are easily recovered from this state with a local administrator account that has been issued a secure token on the device.

Resolution
There are two ways to resolve this situation:

• Resolve a Missing or Invalid MacOS Service Account
• Recover Devices That Have a User Without a Secure Token

Resolving a Missing or Invalid MacOS Service Account

To resolve a missing or invalid macOS service account:

1. Log in to the .
2. Go to DEVICE MANAGEMENT > Devices.
3. Select Needs Attention and select a device. This list only contains devices that were created more than 10 days ago.
4. If the device does not have a service account but admins have secure tokens, the View admin list link appears:
   1. °ä±ô¾±³¦°ìÌýView admin list.
   2. Review this list of local administrators identified on the device that have a valid service account.
   3. Log into the device with one of the local administrator accounts on the list to resolve the issue and create the ºÚÁϺ£½Ç91Èë¿Ú Service Account. After logging into a ºÚÁϺ£½Ç91Èë¿Ú-managed device with a user that has a valid secure token, the ºÚÁϺ£½Ç91Èë¿Ú Service Account will be created.
5. If the device does not have a service account but the admin has a valid secure token, you must:
   1. Open Finder on your device.
   2. Navigate to the /Applications folder.
   3. Double click the ºÚÁϺ£½Ç91Èë¿ÚServiceAccount.app file to run it.
   4. Select your username from the dropdown list and enter the password associated with it.
   5. Click Create Account.
6. If the macOS device has reported it does not have a valid local or disk password or there is no View admin list link, then a manual reinstall of the ºÚÁϺ£½Ç91Èë¿Ú agent over the top of the existing agent is required. During the reinstallation process, users will be prompted to input credentials of an admin user with a valid secure token. If no account is present, follow the steps in Recovering Devices That Have a User Without a Secure Token below.
7. If the device has a service account but the local password or disk password are not valid, then the service account is invalid and the agent must be manually reinstalled over the top of the existing agent to resolve the issue.

During the process of reinstalling the agent over an existing install, you’ll be prompted to enter administrative credentials to install the service account. See Install the Mac Agent.

Recovering Devices That Have a User Without a Secure Token
If you’re unable to create the ºÚÁϺ£½Ç91Èë¿Ú Service Account by using the Service Account utility and selecting any username/password combination, then it’s possible that none of your macOS accounts have a Secure Token associated with them, which is a requirement to generate the ºÚÁϺ£½Ç91Èë¿Ú Service Account. This can be fixed without a reset of the device, but it does require the FileVault Recovery Key for the device. This process is not possible via remote screen-sharing. 

To recover a device without a secure token:

1. Boot to macOS Recovery.
2. When prompted, select a User or click Forgot All Passwords.
   
3. Enter the FileVault Recovery Key for the device.
   
4. Under the Utilities menu, select Terminal.
5. From the Terminal prompt, type resetFileVaultpassword and press Enter. A Reset Password window launches behind the Terminal window.​â¶Ä‹â¶Ä‹â¶Ä‹â¶Ä‹â¶Ä‹
   

6. Enter a new password and verify it, then click Next.
7. Click Restart.

As part of the password reset process, the resetFileVaultpassword tool also resyncs the secure token attribute for the account. That action allows FileVault to work normally again.