Upon buying an SSL certificate of the AlphaSSL Wildcard type with three years period via OBAS store the following error message appears:
The certificate you are applying for exceeds GlobalSigns maximum certificate validity period. It will be valid until 31 December 2016
Such behavior was classified as the software issue PBAS-30083 and was fixed in OBAS 4.5.5 release.
To resolve the issue, please upgrade to 4.5.5 as described in How to upgrade OBAS system to the latest available version.