# Migration v8 to v9: Issues linking existing users (LDAP) to Google Authentication

**URL:** <https://forums.concretecms.org/t/migration-v8-to-v9-issues-linking-existing-users-ldap-to-google-authentication/9746>\
**Category:** Developing with Concrete\
**Created:** [January 29, 2026, 8:51am UTC](https://forums.concretecms.org/t/migration-v8-to-v9-issues-linking-existing-users-ldap-to-google-authentication/9746 "2026-01-29T08:51:01Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![mhawke](https://forums.concretecms.org/user_avatar/forums.concretecms.org/mhawke/32/6297_2.png) [@mhawke](https://forums.concretecms.org/u/mhawke)\
**Post date:** [January 29, 2026, 4:11pm UTC](https://forums.concretecms.org/t/migration-v8-to-v9-issues-linking-existing-users-ldap-to-google-authentication/9746/2 "2026-01-29T16:11:47Z")

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Does this help?

> **[Macareux LDAP Authentication](https://market.concretecms.com/products/macareux-ldap-authentication/646f2cf1-ed26-11ef-abb4-0e1cf28cdc53)**
>
> Easily integrate LDAP (Lightweight Directory Access Protocol) authentication into Concrete CMS with this package. Connect multiple LDAP servers for user authentication with flexible configuration options, including user and group synchronization.

And the drama that lead up to it’s release.

> [@LDAP/Active Directory (not Azure or Entra ID)](https://forums.concretecms.org/t/ldap-active-directory-not-azure-or-entra-id/8574/47):
>
> Hi Hissy, I see that the minimum required version is v9, is there any way this can work with v8.5? There’s things blocking my particular use-case from upgrading to v9 until a while in the future (this year or next year). Also thanks for letting me know! smiley

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_[View the full topic](https://forums.concretecms.org/t/migration-v8-to-v9-issues-linking-existing-users-ldap-to-google-authentication/9746)._