Hi @Georgi Kovachev ,
You will likely need to ask the reception or info point at the Sofia University building.
Also note that Microsoft Certification / Exams is currently not supported in the Q&A forums, the supported products are listed over here https://learn.microsoft.com/en-us/answers/products (more to be added later on).
For further assistance I suggest you ask the experts in the dedicated Microsoft Certification - Exams - Exam Registration and Scheduling forum over here:
(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)