Please refer the following KA which we have created to support this scenario:
Apart from altering the attribute 'MAX_HOST_NAME_PREFIX_LENGTH' in providers.json file, it is also required to edit CMU:CloudAdvancedInterface and CMF:CloudServicesFulfillment form in the AR Dev studio.
Please do let me know if it works. If not, open a case with us (cloud support) and will assist you on this
Many thanks for your feedback. I'm not sure if the KB article solves my issue.
I have the requirement to build a hostname which has a prefix like ABC, a subsequent number like 01234 and a postfix like D - so the hostname should look like ABC01234D.
Do you know if this is possible and if yes, what I would need to customize to realize it.