Will Device Status Show Offline, if SCCM server TCP Port 10123 blocked?

Most of the devices for our site show offline in the SCCM console. This is believed to have started happening after a recent update to SCCM server. SCCM client on the examined client machine is up to date (5.00.9135.1006).

Confirmed: SCCM server port 10123 is closed.

Will device status show offline, if SCCM server TCP port 10123 blocked (fall back to backups 80/443)?

Site Properties: Communication Security: HTTPS Only

SCCM Version: 5.00.9135.1000

Build: 9135

From example "offline" client:

CcmNotificationAgent.log

<![LOG[CRL Checking is Enabled.]LOG]!><time="07:24:09.447+240" date="08-25-2025" component="BgbAgent" context="" type="1" thread="5416" file="bgbcontroller.cpp:286"> <![LOG[Both TCP and http are enabled, let's try TCP connection first.]LOG]!><time="07:24:09.447+240" date="08-25-2025" component="BgbAgent" context="" type="1" thread="5416" file="bgbcontroller.cpp:806"> <![LOG[Connecting to server with IP: 10.200.242.73 Port: 10123 ]LOG]!><time="07:24:09.447+240" date="08-25-2025" component="BgbAgent" context="" type="1" thread="5416" file="bgbtcpclient.cpp:698"> <![LOG[Failed to connect to server with IP v4 address with error 10061. Try next IP... ]LOG]!><time="07:24:11.750+240" date="08-25-2025" component="BgbAgent" context="" type="1" thread="5416" file="bgbtcpclient.cpp:702"> <![LOG[Failed to signin bgb client with error = 80004005.]LOG]!><time="07:24:11.750+240" date="08-25-2025" component="BgbAgent" context="" type="3" thread="5416" file="bgbcontroller.cpp:649"> <![LOG[Connecting to server with IP: 10.200.242.73 Port: 10123 ]LOG]!><time="07:25:11.759+240" date="08-25-2025" component="BgbAgent" context="" type="1" thread="5416" file="bgbtcpclient.cpp:698"> <![LOG[Failed to connect to server with IP v4 address with error 10061. Try next IP... ]LOG]!><time="07:25:14.048+240" date="08-25-2025" component="BgbAgent" context="" type="1" thread="5416" file="bgbtcpclient.cpp:702"> <![LOG[Failed to signin bgb client with error = 80004005.]LOG]!><time="07:25:14.048+240" date="08-25-2025" component="BgbAgent" context="" type="3" thread="5416" file="bgbcontroller.cpp:649"> <![LOG[Fallback to HTTP connection.]LOG]!><time="07:25:14.048+240" date="08-25-2025" component="BgbAgent" context="" type="1" thread="5416" file="bgbcontroller.cpp:842">

]LOG]!><time="14:01:06.211+240" date="08-25-2025" component="BgbAgent" context="" type="1" thread="5416" file="Event.cpp:843">
<![LOG[Message validation failure with error = 80004005.]LOG]!><time="14:01:06.215+240" date="08-25-2025" component="BgbAgent" context="" type="3" thread="5416" file="bgbconnector.cpp:793">
<![LOG[Failed to signin bgb client with error = 80004005.]LOG]!><time="14:01:06.215+240" date="08-25-2025" component="BgbAgent" context="" type="3" thread="5416" file="bgbcontroller.cpp:649">
<![LOG[Sleep 3100 seconds to restart client...]LOG]!><time="14:01:06.215+240" date="08-25-2025" component="BgbAgent" context="" type="1" thread="5416" file="bgbcontroller.cpp:483">