> For the complete documentation index, see [llms.txt](https://help.security.gallagher.com/knowledge-hub/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.security.gallagher.com/knowledge-hub/products/cloud-services/command-centre-mobile-client/troubleshoot/mobile-client-mobile-client-trouble-co.md).

# Mobile Client cannot connect to Gallagher Cloud (8.60)

Restore Mobile Client cloud connections after a missing or invalid server certificate.

From 8.60, a new Gallagher Cloud feature connects the Mobile Client. A connection error can appear if, under Server Properties → Web Services, the certificate is set to external but not actually set. The certificate may have been removed from the server's certificate store, for example after moving servers.

**Resolution:** provide your own certificate (Custom Certificate), or select the **Default Internal Certificate**. After changing certificates, **re-enrol** any existing Mobile Clients. Once on the Default Internal Certificate, you no longer need to re-enrol when the databases move to a new system, because the certificate is stored securely in the database.

![iPhone Add Server screen (via Gallagher API Gateway) showing the certificate error - "The certificate used to transfer session keys from the client to the server cannot be found in the server certificate store"](https://328339335-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F6bM8WhlBE9BYizPWJaPN%2Fuploads%2Fgit-blob-b9c72905e542c3d113789967b1d19b04563c9ef8%2FSECHUB-cc-mobile-client-cloud-connect-03-certificate-error.png?alt=media)

![Manage Mobile Web Services Certificate dialog - External Certificate option selected (the certificate that has gone missing)](https://328339335-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F6bM8WhlBE9BYizPWJaPN%2Fuploads%2Fgit-blob-eb068f89595bb1c90d13488e9cec9fc6f75f43c2%2FSECHUB-cc-mobile-client-cloud-connect-01.jpg?alt=media)

![Server Properties → Web Services tab - the Mobile App gateway failing to start: "no certificate available, certMode = External"](https://328339335-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F6bM8WhlBE9BYizPWJaPN%2Fuploads%2Fgit-blob-cf277cdb01c4a0f28920f77c1ffcd35388cf9e68%2FSECHUB-cc-mobile-client-cloud-connect-02.jpg?alt=media)

***

🔗 **Related**

* [HTTP Error 503](/knowledge-hub/products/cloud-services/command-centre-mobile-client/troubleshoot/mobile-client-http-error-503.md). Environment issues blocking the cloud connection.
* [Invalid provider type specified error](/knowledge-hub/products/cloud-services/command-centre-mobile-client/troubleshoot/mobile-client-invalid-provider-type-sp.md). CNG vs CAPI1 certificates.


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