have error 5102 each time I try my usual hotmail, how can I get rid of this and return to normality instead of having to google hotmail through microsoft account

for a week now I have not been able to access my mail through usual Hotmail account, can read and reply through Microsoft but this is not the easy access I had.  Server error 5102 ID 0x8DE00002 cannot be got rid of.  Have checked everything else and there are no issues but why has this happened.