DMZ MP not upgrading

I recently upgraded to CM version 2303.  I have a management point in an untrusted DMZ.  The installation status shows the upgrade completed successfully.  But the management point in the DMZ will not upgrade.  I have the site system role for that server configured to use a service account as the site system installation account, that is configured as an admin on that server.  If I look in the sitecomp.log I see the following errors:

NetUseAdd failed : 1326 : dwParamError = 0 for user domain.dmz/user connecting to server DMZSCCM.DOMAIN.DMZ

CmSspiLogonUser failed for ["Display=\\DMZSCCM.PUSD.DMZ\"]MSWNET:["SMS_SITE=PWY"]\\DMZSCCM.DOMAIN.DMZ\. SMS_SITE_COMPONENT_MANAGER 10/17/2023 9:14:39 AM 57136 (0xDF30)

Failed to make a network connection to \\DMZSCCM.DOMAIN.DMZ\ADMIN$ (0x52e). SMS_SITE_COMPONENT_MANAGER 10/17/2023 9:14:39 AM 57136 (0xDF30).

If I manually UNC to that same share in Windows Explorer from the site server to the server in the DMZ with that same account I can connect.  Also, from the CM console I can go to Security => Accounts, select the service account properties and can successfully verify access to the same share.  So, I don't know why that error is being thrown.  The account obviously has rights and can connect from the site server. Any help is appreciated.  Thanks.