To generate a Certificate Signing Request (CSR) for Exchange 2010, follow these steps:

1. Open the Exchange Management Shell: Start by going to Start > Programs > Microsoft Exchange 2010 > Exchange Management Shell.

2. Run the CSR Command:

   New-ExchangeCertificate -GenerateRequest -KeySize 2048 -SubjectName "c=US, s=California, o=Company Inc., cn=FirstDomain.com" -DomainName SecondDomain.com, ThirdDomain.com* -PrivateKeyExportable:$true
   

   • Replace XX with your locality (e.g., US).
   • Replace YY with your state or province (e.g., California).
   • Use your primary domain (FirstDomain.com) and additional domains (SecondDomain.com, ThirdDomain.com).

3. Copy the CSR: After running the command, right-click on the output to mark it, then copy and paste it into your certificate activation form.

4. Save the CSR Locally (optional):

   Set-Content -path "C:\CSR_Name.csr" -Value $Data
   

   Replace CSR_Name with your desired filename.

5. Activate the Certificate: Use the generated CSR during the SSL activation process on Esadax or your provider's platform.