Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

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moabdallah
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Dec 29, 2022
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Outlook NTL Authentication

Hello Everyone

I'm tring to Use F5 APM in the middle of communications between user and Microsoft Exchange server 2013 and I use Exchange IApp templte to configure login Page and access policy and everything work as expected (OWA,Mobile App)

as it use Basic Http web authentication but outlook client can't connect as it use NTLM authentication and I could find the following Logs in Access log:

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Nov 26 23:58:15 f5-waf notice apmd[12748]: 01490010:5: /Common/Private.app/exch:Common:a73c9739: Username 'company.com/User_52'
Nov 26 23:58:15 f5-waf err apmd[12748]: 01490107:3: /Common/Private.app/exch:Common:a73c9739: AD module: authentication with 'Mycompany.com/User_52' failed: Client 'Mycompany.com/User_52@Mycompany.COM' not found in Kerberos database, principal name: Mycompany.com/User_52@Mycompany.COM. Please verify Active Directory and DNS configuration. (-1765328378)
Nov 26 23:58:15 f5-waf notice apmd[12748]: 01490005:5: /Common/Private.app/exch:Common:a73c9739: Following rule 'fallback' from item 'AD Auth' to ending 'Deny'
Nov 26 23:58:15 f5-waf notice apmd[12748]: 01490102:5: /Common/Private.app/exch:Common:a73c9739: Access policy result: Logon_Deny
Nov 26 23:58:15 f5-waf notice apmd[12748]: 01490248:5: /Common/Private.app/exch:Common:a73c9739: Received client info - Hostname: Type: activesync Version: 0 Platform: PocketPC CPU: unknown UI Mode: Active Sync Javascript Support: 0 ActiveX Support: 0 Plugin Support: 0

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