not my contacts

Hello All

 

We have shared laptops at work and so diff people use them to log in to their email accounts. what never used to happen but has started recently in last few weeks is that when i log in after someone else and try to send email to someone in my contacts its not there and its whoever was last logged in contacts showing...

 

this is very annoying but also making work impossible...any suggestions on how to fix pls

 

thank you