# Will new Microsoft DCOM changes affect Ignition

**URL:** <https://forum.inductiveautomation.com/t/will-new-microsoft-dcom-changes-affect-ignition/70790>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [March 8, 2023, 6:01pm UTC](https://forum.inductiveautomation.com/t/will-new-microsoft-dcom-changes-affect-ignition/70790 "2023-03-08T18:01:16Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Aman\_Pawar](https://avatars.discourse-cdn.com/v4/letter/a/7ba0ec/32.png) [@Aman\_Pawar](https://forum.inductiveautomation.com/u/Aman_Pawar)\
**Post date:** [March 8, 2023, 6:01pm UTC](https://forum.inductiveautomation.com/t/will-new-microsoft-dcom-changes-affect-ignition/70790/1 "2023-03-08T18:01:16Z")

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[https://support.microsoft.com/en-us/topic/kb5004442-manage-changes-for-windows-dcom-server-security-feature-bypass-cve-2021-26414-f1400b52-c141-43d2-941e-37ed901c769c](https://support.microsoft.com/en-us/topic/kb5004442-manage-changes-for-windows-dcom-server-security-feature-bypass-cve-2021-26414-f1400b52-c141-43d2-941e-37ed901c769c)

new Microsoft changes are coming which will further secure DCOM.  
This may impact O/T applications that often use DCOM and RPC to communicate via Windows.  
there is any concern for Ignition Gateway?

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**Author:** ![Felipe\_CRM](https://avatars.discourse-cdn.com/v4/letter/f/dfb087/32.png) [@Felipe\_CRM](https://forum.inductiveautomation.com/u/Felipe_CRM)\
**Post date:** [March 8, 2023, 6:02pm UTC](https://forum.inductiveautomation.com/t/will-new-microsoft-dcom-changes-affect-ignition/70790/2 "2023-03-08T18:02:55Z")

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If I recall correctly, DCOM issues mainly affect the old OPC-DA protocol, while Ignition uses the newer OPC-UA, so it should be fine with that.

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [March 8, 2023, 6:03pm UTC](https://forum.inductiveautomation.com/t/will-new-microsoft-dcom-changes-affect-ignition/70790/3 "2023-03-08T18:03:34Z")

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This isn't new and coming any more, this already happened.

There are no changes required on the Ignition side, but it's possible you may need to update server software or DCOM security settings if you're connected to an old OPC Classic server remotely over DCOM.

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**Author:** ![Aman\_Pawar](https://avatars.discourse-cdn.com/v4/letter/a/7ba0ec/32.png) [@Aman\_Pawar](https://forum.inductiveautomation.com/u/Aman_Pawar)\
**Post date:** [March 8, 2023, 6:04pm UTC](https://forum.inductiveautomation.com/t/will-new-microsoft-dcom-changes-affect-ignition/70790/4 "2023-03-08T18:04:52Z")

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What about OPC UA connection?

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [March 8, 2023, 6:05pm UTC](https://forum.inductiveautomation.com/t/will-new-microsoft-dcom-changes-affect-ignition/70790/5 "2023-03-08T18:05:12Z")

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This doesn't affect OPC UA connections in any way.