Configure Platform Settings SMTP Server with FQDN for Microsoft Exchange Online in FMC

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Updated:May 8, 2026
Document ID:225871

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Contents

Issue

The Platform Settings in Firewall Management Center (FMC) only allows IP addresses to be entered for the SMTP server configuration field. However, when using Microsoft Exchange Online, the configuration requires using a Fully Qualified Domain Name (FQDN) instead of an IP address. This limitation prevents proper SMTP server configuration for environments that rely on Microsoft Exchange Online services, as the system does not accept FQDN entries in the SMTP server field within Platform Settings.

FQDN_not_supported_for_SNMP_Server.pngFQDN_not_supported_for_SNMP_Server.png

Environment

  • Firewall Management Center (FMC) 7.4. Other software versions can be also affected.

Resolution

  • This feature is not currently supported.

  • Enhancement Cisco bug ID CSCwu25196 was filed.

Cause

The Platform Settings interface in Firepower Management Center has a limitation that restricts SMTP server configuration to IP address format only, preventing the entry of FQDNs that are required for Microsoft Exchange Online SMTP services.

Related Content

Revision History

Revision Publish Date Comments
1.0
08-May-2026
Initial Release
TAC Authored

Contributed by Cisco Engineers

  • Mikis Zafeiroudis
    Cisco TAC Engineer
  • Ilkin Gasimov
    Cisco TAC Engineer

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