Creating hardlink Microsoft Exchange Writer

In almost every backup i see this warnings
what can i do to fix it?
These is a server client with Exchange

2021-10-14 09:16:49(warning): Creating hardlink from “E:\NAME\211013-2013.symlink_Microsoft Exchange Writer_{76FE1AC4-15F7-4BCD-987E-8E1ACB462FB7}1ba7dd2293ce253955b3cbb4596dbefc_Logs_files00000000\E0000024317.log" to "E:\NAME\211014-0905.symlink_Microsoft Exchange Writer{76FE1AC4-15F7-4BCD-987E-8E1ACB462FB7}1ba7dd2293ce253955b3cbb4596dbefc_Logs_files00000000\E0000024317.log" failed. De aanvraag wordt niet ondersteund. (code: 50). Loading file…
2021-10-14 09:16:50(warning): Creating hardlink from "E:\NAME\211013-2013.symlink_Microsoft Exchange Writer
{76FE1AC4-15F7-4BCD-987E-8E1ACB462FB7}1ba7dd2293ce253955b3cbb4596dbefc_Logs_files00000000\E0000024318.log" to "E:\NAME\211014-0905.symlink_Microsoft Exchange Writer{76FE1AC4-15F7-4BCD-987E-8E1ACB462FB7}_1ba7dd2293ce253955b3cbb4596dbefc_Logs_files00000000\E0000024318.log” failed. De aanvraag wordt niet ondersteund. (code: 50). Loading file…

E:\ is my backup location in URbackup