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Affected version(s):  7.10.5 or later


You are trying to update your Open-Xchange Appsuite installation to 7.10.5 (or later) and get an error message after adding the new repository:

Err:1 InRelease
 The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 12111537DFD4BCF6

Root Cause

With the release Open-Xchange 7.10.5 we also rolled out a new cryptographic key for package and repository signing,  using future-proof cryptography and comply with upcoming platform requirements. In order to update packages from it is mandatory to deploy and trust the updated public key. 


Install the new key, see

updated documentation