Using Your Own Certificate

You need to complete the steps on the Running the PowerShell Script for Entra ID App Registration page before starting the steps on this page.

If you create your own certificate, follow this configuration:

• Certificate format: x509
• Hash Algorithm: sha256
• Encryption Algorithm: rsa2048

Using a mac

On a Mac, use OpenSSL to generate a certificate with these steps:

1. Generate a self-signed certificate (x509 with rsa 2048 valid for 2 years) by running the following command:
2. openssl req -x509 -sha256 -days 730 -newkey rsa:2048 -keyout privateKey.key -out certificate.crt
3. This will generate two files: privateKey.key and certificate.crt
2. Upload the certificate.crt in the Certificates & secrets section for the target Application Registration in the Entra ID admin center.
3. Remove the passphrase from the certificate key by running the following command:
4. openssl rsa -in privateKey.key -out privateKeyWoPass.key
4. Use certificate.crt and privateKeyWoPass.key to configure your custom Teams app in Keepit

Go to the Access Entra Admin Center and Upload Your Certificates page and complete the steps on that page.