Hello, Hamza !
Thank you for contacting Microsoft's Community.
Based on your inquiry, we understand you want to verify the best certificate based on your needs, we are happy to help you.
We can suggest this page which instructs and adapts the certificates and skills that are best for your profile. Learning Site.
We invite you to check the following link with the information about the courses and certifications available for you:
Regarding Microsoft Exchange Online this is included in the course for Microsoft 365, there is no course for only this topic.
Please keep in mind that the Microsoft Certification Team continually monitors industry trends to keep pace with changes in technology, resulting in the introduction, revision, or retirement of some exams.
Microsoft Certifications that contain the topics you are interested in is divided into three levels:
1. Fundamental Level: An introductory level targeted at people who are just getting started with SharePoint Server or SharePoint Online. This credential verifies a specialist’s knowledge of the advantages of the SaaS cloud model and how to use the Microsoft 365 cloud service.
The Certification is: Microsoft Certified Microsoft 365 Fundamentals
2. Associate Level means that you’ve had at least two years of hands-on experience with the platform. With this certification, a professional can install, deploy, and manage Office 365 collaboration applications like SharePoint (Online, On-Premises, and Hybrid), OneDrive, and Teams.
The Certification is: Microsoft 365 Certified: Teams Administrator Associate
3. Expert Level assumes 2-5 years of in-depth SharePoint technological experience. This certification includes assessing, preparing, migrating, implementing, and maintaining Microsoft 365 services, among other topics.
The Certification is: Microsoft 365 Certified: Enterprise Administrator Expert
Since you work in the IT department of your company, you may also want to consider exploring other Microsoft certifications that we offer which will also verify your skills and unlock professional opportunities. To get a full list of the current certifications that we offer, please visit this page: Browse Certifications and Exams | Microsoft Docs
We hope this is useful to you, if there is anything else we can do for you, please do not hesitate to stay connected with us.
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Best Regards,