Merge pull request #246754 from arielsaghiv/patch-143

Update certificate-requirements.md

Author: prmerger-automator[bot]

articles/defender-for-iot/organizations/best-practices/certificate-requirements.md

@@ -60,6 +60,10 @@ Make sure that your certificates include the following CRT parameter details:
 
 Make sure that your certificate key files use either RSA 2048 bits or 4096 bits. Using a key length of 4096 bits slows down the SSL handshake at the start of each connection, and increases the CPU usage during handshakes.
 
+> [!TIP]
+> The following characters can be used when creating a key or certificate with a passphrase:
+> ASCII characters (a-z, A-Z, 0-9) are supported, as well as the following symbols ! #  % ( ) + , - . /  :  =  ?  @  [  \  ]  ^  _  {  }  ~
+
 ## Next steps
 
 > [!div class="step-by-step"]