Hi team,
we have an error when we try to update a small deployment of vRA 7.3.1 :
We have try :
4 - https://kb.vmware.com/s/article/2147446
We see this in cluster TAB :
4 services are UNAVAILABLE or BLANK :
We can't find any specifics taks to upgrade from 7.3.1 to 7.4.
Accepted Solutions
Ok you have find a Workaround 
In a vRA management console > Services :
The vco service IS BLANK and shell-ui-app,advanced-designer-service & o11n-gateway-service were showing as UNAVAILABLE.
Workaround :
after upgrade connect to SSH on vRA appliance then browse to :
/ETC/VCO/APP-SERVER
Duplicate the file "sso.properties"
edit file "sso.properties" and check if you have parameters about the correct TENANT :
com.vmware.o11n.sso.default.tenant = YOUR_TENANT_NAME
com.vmware.o11n.sso.admin.group.name = YOUR_ADMIN_GROUP
com.vmware.o11n.sso.admin.group.domain = YOUR_ACTIVE_DIRECTORY_DOMAIN
Execute this command on vRA appliance
service vco-server restart
Go back to vRA management console and check if now all services are "REGISTRED"
Execute this command on vRA appliance
/etc/init.d/vco-configurator start
Go to vRO Control Center : Connect with ROOT password.
Click on "Authentication Provider"
If you see "Default tenant : vsphere.local" click CHANGE and assign the same parameters of "SSO.PROPERTIES" file.
After
Go back to SSH console and execute this command on vRA appliance
service vco-server restart
Go back to vRO Control Center and click on "Validate Configuration"
U win !
Ok you have find a Workaround
In a vRA management console > Services :
The vco service IS BLANK and shell-ui-app,advanced-designer-service & o11n-gateway-service were showing as UNAVAILABLE.
Workaround :
after upgrade connect to SSH on vRA appliance then browse to :
/ETC/VCO/APP-SERVER
Duplicate the file "sso.properties"
edit file "sso.properties" and check if you have parameters about the correct TENANT :
com.vmware.o11n.sso.default.tenant = YOUR_TENANT_NAME
com.vmware.o11n.sso.admin.group.name = YOUR_ADMIN_GROUP
com.vmware.o11n.sso.admin.group.domain = YOUR_ACTIVE_DIRECTORY_DOMAIN
Execute this command on vRA appliance
service vco-server restart
Go back to vRA management console and check if now all services are "REGISTRED"
Execute this command on vRA appliance
/etc/init.d/vco-configurator start
Go to vRO Control Center : Connect with ROOT password.
Click on "Authentication Provider"
If you see "Default tenant : vsphere.local" click CHANGE and assign the same parameters of "SSO.PROPERTIES" file.
After
Go back to SSH console and execute this command on vRA appliance
service vco-server restart
Go back to vRO Control Center and click on "Validate Configuration"
U win !
True @
when all services VA has been started, the automatic update has continued without error on IaaS server :
