Using the STSADM commands
Central Admin
1. stsadm -o updatefarmcredentials -userlogin [Service Account] -password [Password]
IISRESET /NOFORCE
NOTE:
One or more errors deploying administration application pool credentials. Please check the application event log and fix manually. This command must either be used on a server where Central Administration is running, or you must specify the -local parameter.
There was an error encrypting or decrypting credentials. Either a credential update is currently being performed, or you must update the farm account credentials on this server before you can perform this task. Run the above command with -local parameter
App pool password change
2. stsadm -o updateaccountpassword -userlogin [Service Account] -password [Password] -noadmin
IISRESET /NOFORCE
NOTE: in case there is an error in the above step saying "please retry manually”. Re-run the above script after opening the Central Admin site.
WSS Search Help
3. stsadm.exe -o spsearch -farmserviceaccount [Service Account] -farmservicepassword [Password]
4. stsadm.exe -o spsearch -farmcontentaccessaccount [Service Account] -farmcontentaccesspassword [Password]
SSP
5. stsadm.exe -o editssp -title [Name of SharedServices] -ssplogin [Service Account] -ssppassword [Password]
Office SharePoint Service Search
6. stsadm.exe -o osearch -farmserviceaccount [Service Account] -farmservicepassword [Password]
7. Finally, Manually change the password for “Default content access account”
Central Admin
1. stsadm -o updatefarmcredentials -userlogin [Service Account] -password [Password]
IISRESET /NOFORCE
NOTE:
One or more errors deploying administration application pool credentials. Please check the application event log and fix manually. This command must either be used on a server where Central Administration is running, or you must specify the -local parameter.
There was an error encrypting or decrypting credentials. Either a credential update is currently being performed, or you must update the farm account credentials on this server before you can perform this task. Run the above command with -local parameter
App pool password change
2. stsadm -o updateaccountpassword -userlogin [Service Account] -password [Password] -noadmin
IISRESET /NOFORCE
NOTE: in case there is an error in the above step saying "please retry manually”. Re-run the above script after opening the Central Admin site.
WSS Search Help
3. stsadm.exe -o spsearch -farmserviceaccount [Service Account] -farmservicepassword [Password]
4. stsadm.exe -o spsearch -farmcontentaccessaccount [Service Account] -farmcontentaccesspassword [Password]
SSP
5. stsadm.exe -o editssp -title [Name of SharedServices] -ssplogin [Service Account] -ssppassword [Password]
Office SharePoint Service Search
6. stsadm.exe -o osearch -farmserviceaccount [Service Account] -farmservicepassword [Password]
7. Finally, Manually change the password for “Default content access account”