Hi @Ashish Javiya ,
Connect-SPOService : The sign-in name or password does not match one in the Microsoft account system.
According to this error message, there are two possible reasons for this error – either you have made a mistake while inserting your credentials, or you have a multi-factor authentication enabled (MFA). If it is due to the MFA, you will need to remove the -Credential parameter while connecting to SharePoint Online and enter your credentials with the traditional, login page experience.
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And please refer to this blog for more information about how to connect SPO with MFA
Connect to SharePoint Online using PowerShell with MFA (Multi-factor Authentication)
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