Steps for Service Account Change in Moss

The steps to change the service account is as follows,
1. Change the service account for all “Windows Service” and “Web application pool” through the Central Administrations->Operations Tab->Service Accounts link
2. stsadm –o updatefarmcredentials –userlogin -password
3. You must run IISReset /noforce to complete the action.
4. Wait for the "Administration Application Pool Credential Deployment" job definition to go away on the Timer Job Definitions central admin page
5. stsadm -o updateaccountpassword -userlogin -password –noadmin
6. stsadm -o spsearch -farmserviceaccount -farmservicepassword
7. stsadm -o editssp -title -ssplogin -ssppassword
8. stsadm -o osearch -farmserviceaccount -farmservicepassword