问题 I cannot install RDCOMClient, using R-3.6 Some background: RDCOMClient works in my R-3.51 instance, and I need to use 3.6, and I need to use RDCOMClient to interact with my desktop's Outlook. mailR and sendmailR are not currently an option. Thing's I've tried: >install.packages("RDCOMClient") Installing package into ‘C:/Users/<user>/Documents/R/win-library/3.6’ (as ‘lib’ is unspecified) Warning in install.packages : package ‘RDCOMClient’ is not available (for R version 3.6.0) > library(