# Certificates

Here you can specify how often the TLS certificates are regenerated. You can also generate the certificates manually if required.

If the communication server itself is a TLS client, e.g. in a network configuration, the certificates required can be imported and exported here.

## Host

## Host certificate for Lync

If the communication server is used with Lync, it requires a Lync server host certificate. You can import and delete this host certificate here.

## Host certificate for SMTP client

If the communication server is used with SMTP client, it requires a SMTP server host certificate. You can import and delete the host certificate here.

## External host certificates / CA host certificates

If the communication server is used as TLS client, it requires a remote station host certificate. You can import and delete the host certificate here.

Parent topic: IP Security
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