Feeling Stuck After Internal Job Offer: Can My Manager Stop Me from Moving Departments?

I am working in an IT company for a year now, initially training for a period of 6 months and then currently on a project for a period of 6 months. I was told I would have the designation of MS D365 Technical Consultant but was later given the position of MS D365 CRM Customer Solution Associate. I was not happy with the designation and felt trapped by the words initially in the project.

I had an opportunity to apply for an internal job posting for automation testing. I applied and was also selected for that position.

My Question
Can the current manager hold me back and not let me go to the new department even though I'm selected? What if they trap me again and do not let me go to the selected department? What action should be taken in such a case? Kindly suggest.

Hi, These are company-specific issues. Even though you got selected, the consent of your Reporting Authority will be taken into consideration. Also, other factors like who will replace your current responsibility, etc., will be considered. Finally, it is purely at the discretion of your Management, and you can't demand it as a matter of right. However, the only weapon you have is resignation. If you are not happy with your current role and responsibility, look for a new job as per your desire and move on!