https://community.blueprism.com/t5/Product-Forum/MapIEX-Failed-to-access-message-store/m-p/78779#M30763 Hi, Try 1 of 2 things 1, repair the MAPIEx installation by running the MAPIEx installer, but select ""repair"" 2, set your outlook to not use the ""use cached exchange mode"", by un-selecting. (this is suggested by BP on their MAPIEx installation doc) Fri, 13 Apr 2018 13:58:00 GMT Anonymous 2018-04-13T13:58:00Z https://community.blueprism.com/t5/Product-Forum/MapIEX-Failed-to-access-message-store/m-p/78776#M30760 Hi, I'm using Mapiex to send emails where it was all working fine till Friday. Today morning the same Vm is giving me an error "Failed to access message store." Only thing which changed since Friday is Microsoft office was reinstalled. What should be changed to resolve this? Mon, 19 Mar 2018 14:37:00 GMT https://community.blueprism.com/t5/Product-Forum/MapIEX-Failed-to-access-message-store/m-p/78776#M30760 NarendraMundwad 2018-03-19T14:37:00Z https://community.blueprism.com/t5/Product-Forum/MapIEX-Failed-to-access-message-store/m-p/78777#M30761 I have the same problem, but it only occurs occationally, can it be that someone is accessing the same outlook folder at the same time ? Are you running 32 bit office ? Wed, 21 Mar 2018 22:16:00 GMT https://community.blueprism.com/t5/Product-Forum/MapIEX-Failed-to-access-message-store/m-p/78777#M30761 OleG 2018-03-21T22:16:00Z https://community.blueprism.com/t5/Product-Forum/MapIEX-Failed-to-access-message-store/m-p/78778#M30762 We have Office 2016, 32 bit version on BOT machine. However from recent 2-3 days we are getting same error ""Failed to access message store."" but it worked fine after BOT VDI reboot, however would like to know root cause and resolution of this issue. Mon, 26 Mar 2018 14:59:00 GMT https://community.blueprism.com/t5/Product-Forum/MapIEX-Failed-to-access-message-store/m-p/78778#M30762 AmitWade 2018-03-26T14:59:00Z https://community.blueprism.com/t5/Product-Forum/MapIEX-Failed-to-access-message-store/m-p/78779#M30763 Hi, Try 1 of 2 things 1, repair the MAPIEx installation by running the MAPIEx installer, but select ""repair"" 2, set your outlook to not use the ""use cached exchange mode"", by un-selecting. (this is suggested by BP on their MAPIEx installation doc) Fri, 13 Apr 2018 13:58:00 GMT https://community.blueprism.com/t5/Product-Forum/MapIEX-Failed-to-access-message-store/m-p/78779#M30763 Anonymous 2018-04-13T13:58:00Z